parallel relay

- networks of limited equivalence
- network of microcomputer
- abstract semantic network
- active network
- activity network
- adaptive network
- adaptive resonance theory network
- additive Grossberg network - aperiodic network
- ART network
- artificial mains network - asynchronous neural network - back propagation network
- back-up radio network
- balanced network
- balanced Feistel network
- balancing network
- BAM network
- banner network
- baseband network
- basic network
- Bayes network
- beam-forming network - biconjugate network
- bidirectional associative memory network
- bilateral network
- biological neural network
- Boltzman machine neural network
- Boolean network
- brain-state-in-a-box network
- bridge network
- bridged-T network - bus network
- butterfly network
- C-network
- cellular neural network
- cellular radio network
- channel-switching network
- chaotic neural network - circuit-switching network
- class A-network
- class B-network
- class C-network
- client-server network
- closed private network - common-user network
- communications network
- company network
- compromise network
- computer network - connected network
- connectionist network
- connectionless network
- connection-oriented network
- constant-K network
- constant-M network
- continuous Hopfield network
- corrective network
- countable network - coupling network
- crossover network
- customer-access network
- data network
- data transmission network
- decoding network
- decoupling network
- dedicated network
- deemphasis network
- deep-space network
- delta network
- demand-assigned network
- dial-up network
- difference network
- differentiated network
- differentiating network
- digipeater network
- digital communication network
- digital satellite network
- digital switching network - discrete Hopfield network
- dislocation network
- dissymmetrical network
- distributed network
- distributed operating multi-access interactive-network
- distributed parameter network
- dividing network
- Doba's network
- dual network
- edge-dislocation network
- eight-pole network
- eight-terminal network
- electric network - equivalent networks - extensional semantic network
- extensive network - feedback network
- feedforward network
- Feistel network - fixer network
- four-pole network
- four-terminal network
- fractal network
- frequency-dependent negative-resistance network
- fully connected network
- fully connected neural network
- full mesh network
- full meshed network
- fuzzy neural network
- generalized additive network - ground-station network - Hamiltonian neural network
- Hamming's neural network
- Hebb network
- Hecht-Nielsen network
- Hecht-Nielsen neural network
- heterogeneous network
- heterogeneous neural network
- high-capacity network - higher-order neural network
- homogeneous network
- homogeneous neural network
- Hopfield's neural network
- Hopfield-Tank network
- Hopfield-Tank neural network
- hybrid network
- inductance network
- inductance-capacitance network
- inductance-resistance network
- industrial district network
- information network
- in-office network of links - Internet relay chat network
- inter-organizational network
- interstage network
- inverse networks
- IRC network
- irredundant network
- isolation network
- L-network
- ladder network - lattice network
- lead network
- leased-line network
- linear network - load-matching network - long-distance network
- long-haul network
- loop network
- loudspeaker dividing network
- lumped network
- lumped-constant network
- lumped-distributed network
- Kohonen network
- Kohonen self-organizing network
- Kosko network
- Kosko neural network
- learning vector quantization network
- LVQ network
- Markovian network
- matching network
- McCulloch-Pitts network
- merging network
- mesh network
- meshed network
- message-switched network
- metropolitan area network
- mid-level network
- minimum-phase network
- MPLS network
- multiaccess network
- multi-attractor network
- multidimensional network
- multidrop network
- multifractal network
- multiinput-multioutput network
- multilayer neuron network
- multiple-access network
- multiply-connected network
- multipoint network
- multiport network
- multiprotocol label switching network - multistage switching network
- multistar network
- multistation network
- multisystem network
- multiterminal network
- multiterminal-pair network
- municipal area network - neural network with local connections
- neural-like network
- nodal network
- nonlinear network
- nonplanar network
- nonreciprocal network
- nonuniformly distributed network
- notch network
- n-pole network
- n-port network
- n-terminal network
- n-terminal pair network
- O-network
- one-port network
- optical network
- optical fiber network
- optical neural network
- originating switching network
- packet commutation network - packet satellite network
- packet switch network
- packet switching network
- paging network
- parallel network
- parallel-T network
- parallel two-terminal pair networks
- partial mesh network
- partial meshed network
- passive network
- peaking network
- peer-to-peer network
- perceptron-type network
- percolation network
- personal communication network
- phase-advance network
- phase-shifting network
- phase-splitting network
- phasing network
- pi-network
- piece-linear network
- pilot wire controlled network
- planar network
- polarization matching network
- power distribution network
- preassigned network
- preemphasis network
- private network
- private-line intercity network - quadrupole network - radar network
- radio network
- radio access network
- radio intercom network
- radio-relay network
- rearrangeable network
- reciprocal network
- recognition network
- recurrent neural network
- regression neural network
- repeater network
- replicative neural network
- research network
- resistance-capacitance network
- resistive network
- resource-sharing computer-communication-network
- ring-switched computer network
- routing network
- satellite-earth stations network - second-order network
- selective network
- semantic network
- semiconductor network
- series network
- series-peaking network
- series-shunt network
- series-shunt peaking network
- shaping network
- short-haul network
- shuffle network
- shunt network
- shunt-peaking network
- signal-shaping network
- single-layer neural network
- singly terminated network - sorting network
- speaker dividing network
- stabilization network
- star network
- statistical Hopfield's network
- statistical Hopfield's neural network
- steering network - strategic network
- structurally dual networks
- structurally symmetrical networks
- stub network
- summation network
- summing network
- support network
- switched network
- switched message network
- switched telecommunications network
- switching network
- synchronous network
- synchronous neural network - T-network
- tapered distribution network
- technologies support network
- telecommunication network - terminating switching network - token bus network
- Token Ring network
- token ring network
- transit network
- transmission network
- transputer network
- tree network - trusted network
- twin-T network
- two-pole network
- two-port network
- two-terminal network
- two-terminal-pair network
- unbalanced Feistel network
- undersea network
- uniformly distributed network
- unilateral network
- universal network
- untrained neural network - world-wide communication network
- WS network
- X-network
- Y-network
- π-network

- abstract semantic network
- active network
- activity network
- adaptive network
- adaptive resonance theory network
- additive Grossberg network
- advanced intelligent network
- advertiser network
- aeronautical fixed telecommunications network
- all-pass network
- aperiodic network
- ART network
- artificial mains network
- artificial neural network
- asynchronous network
- asynchronous neural network
- attached resource computer network
- attenuation network
- automatic digital network
- automatic voice network
- back propagation network
- backbone network
- back-up radio network
- balanced Feistel network
- balanced network
- balancing network
- BAM network
- banner network
- baseband network
- basic network
- Bayes network
- beam-forming network
- because it's time network
- Benetton network
- biconjugate network
- bidirectional associative memory network
- bilateral network
- biological neural network
- Boltzman machine neural network
- Boolean network
- brain-state-in-a-box network
- bridge network
- bridged-T network
- broadband communication network
- broadband integrated services digital network
- building-out network
- bus network
- butterfly network
- C network
- cellular neural network
- cellular radio network
- channel-switching network
- chaotic neural network
- charge-routing network
- circuit-switched data network
- circuit-switched public data network
- circuit-switching network
- class A network
- class B network
- class C network
- client-server network
- closed private network
- combinatorial network
- commercial network
- common-user network
- communications network
- company network
- compromise network
- computer + science network
- computer network
- concatenated network
- conferencing network
- connected network
- connectionist network
- connectionless network
- connection-oriented network
- constant-K network
- constant-M network
- continuous Hopfield network
- corrective network
- countable network
- counterpropagation network
- coupled-line network
- coupling network
- crossover network
- customer-access network
- data network
- data transmission network
- decoding network
- decoupling network
- dedicated network
- deemphasis network
- deep-space network
- delta network
- demand-assigned network
- dial-up network
- difference network
- differentiated network
- differentiating network
- digipeater network
- digital communication network
- digital satellite network
- digital switching network
- digital time-division network
- directed network
- discrete Hopfield network
- dislocation network
- dissymmetrical network
- distributed network
- distributed operating multi-access interactive network
- distributed parameter network
- dividing network
- Doba's network
- dual network
- edge-dislocation network
- eight-pole network
- eight-terminal network
- electric network
- electronic space-division analog network
- elementary digital network
- equalizing network
- equivalent networks
- European academic and research network
- European Unix network
- exponential network
- extensional semantic network
- extensive network
- fast neural network
- FDNR network
- feedback network
- feedforward network
- Feistel network
- FIDO technology network
- firm network
- fixer network
- four-pole network
- four-terminal network
- fractal network
- frequency-dependent negative-resistance network
- full mesh network
- full meshed network
- fully connected network
- fully connected neural network
- fuzzy neural network
- general regression neural network
- generalized additive network
- global area network
- ground-station network
- ground-wave emergency network
- H network
- Hamiltonian neural network
- Hamming's neural network
- Hebb network
- Hecht-Nielsen network
- Hecht-Nielsen neural network
- heterogeneous network
- heterogeneous neural network
- high energy physics network
- high-capacity network
- higher-order network
- higher-order neural network
- homogeneous network
- homogeneous neural network
- Hopfield's neural network
- Hopfield-Tank network
- Hopfield-Tank neural network
- hybrid network
- inductance network
- inductance-capacitance network
- inductance-resistance network
- industrial district network
- information network
- in-office network of links
- integrated broadband communication network
- integrated business network
- integrated digital network
- integrated enterprise network
- integrated services digital network
- integrating network
- intelligent network
- intelligent optical network
- intercom network
- Internet relay chat network
- inter-organizational network
- interstage network
- inverse networks
- IRC network
- irredundant network
- isolation network
- Kohonen network
- Kohonen self-organizing network
- Kosko network
- Kosko neural network
- L network
- ladder network
- LAN outer network
- land network
- lattice network
- lead network
- learning vector quantization network
- leased-line network
- linear integrated network
- linear network
- linear varying parameter network
- load-matching network
- local area network
- local computer network
- long-distance network
- long-haul network
- loop network
- loudspeaker dividing network
- lumped network
- lumped-constant network
- lumped-distributed network
- LVQ network
- Markovian network
- matching network
- McCulloch-Pitts network
- merging network
- mesh network
- meshed network
- message-switched network
- metropolitan area network
- mid-level network
- minimum-phase network
- MPLS network
- multiaccess network
- multi-attractor network
- multidimensional network
- multidrop network
- multifractal network
- multiinput-multioutput network
- multilayer neuron network
- multiple-access network
- multiply-connected network
- multipoint network
- multiport network
- multiprotocol label switching network
- multiprotocol transport network
- multiservice network
- multistage switching network
- multistar network
- multistation network
- multisystem network
- multiterminal network
- multiterminal-pair network
- municipal area network
- national information network
- network of microcomputer
- networks of limited equivalence
- networks ot general equivalence
- neural network with local connections
- neural network
- neural-like network
- nodal network
- nonlinear network
- nonplanar network
- nonreciprocal network
- nonuniformly distributed network
- notch network
- n-pole network
- n-port network
- n-terminal network
- n-terminal pair network
- one-port network
- O-network
- optical fiber network
- optical network
- optical neural network
- originating switching network
- packet commutation network
- packet data network
- packet radio network
- packet satellite network
- packet switch network
- packet switching network
- paging network
- parallel network
- parallel two-terminal pair networks
- parallel-T network
- partial mesh network
- partial meshed network
- passive network
- peaking network
- peer-to-peer network
- perceptron-type network
- percolation network
- personal communication network
- phase-advance network
- phase-shifting network
- phase-splitting network
- phasing network
- piece-linear network
- pilot wire controlled network
- pi-network
- planar network
- polarization matching network
- power distribution network
- preassigned network
- preemphasis network
- private network
- private-line intercity network
- probabilistic neural network
- projection pursuit network
- public data network
- public land mobile network
- public switched network
- public switched telephone network
- public telegraph network
- public telephone network
- pulse-forming network
- quadripole network
- quadrupole network
- quantum neural network
- queuing network
- radar network
- radio access network
- radio intercom network
- radio network
- radio-relay network
- rearrangeable network
- reciprocal network
- recognition network
- recurrent neural network
- regression neural network
- repeater network
- replicative neural network
- research network
- resistance-capacitance network
- resistive network
- resource-sharing computer-communication network
- ring-switched computer network
- routing network
- satellite tracking and data acquisition network
- satellite-earth stations network
- screw-dislocation network
- second-order network
- selective network
- semantic network
- semiconductor network
- series network
- series-peaking network
- series-shunt network
- series-shunt peaking network
- shaping network
- short-haul network
- shuffle network
- shunt network
- shunt-peaking network
- signal-shaping network
- single-layer neural network
- singly terminated network
- small business network
- social network
- software defined network
- solid-state network
- sorting network
- speaker dividing network
- stabilization network
- star network
- statistical Hopfield's network
- statistical Hopfield's neural network
- steering network
- storage area network
- store-and-forward network
- strategic network
- structurally dual networks
- structurally symmetrical networks
- stub network
- summation network
- summing network
- support network
- switched message network
- switched network
- switched telecommunications network
- switching network
- synchronous network
- synchronous neural network
- synchronous optical network
- systolic network
- tapered distribution network
- technologies support network
- telecommunication network
- telecommunications management network
- teletype network
- terminating switching network
- time delay neural network
- time-division analog network
- time-invariant network
- T-network
- token bus network
- Token Ring network
- token ring network
- transit network
- transmission network
- transputer network
- tree network
- trimming resistive network
- trunk network
- trusted network
- twin-T network
- two-pole network
- two-port network
- two-terminal network
- two-terminal-pair network
- unbalanced Feistel network
- undersea network
- uniformly distributed network
- unilateral network
- universal network
- untrained neural network
- user network
- value-added network
- virtual private network
- weighting network
- wide area network
- wireless intelligent network
- wireless local area network
- wireless wide area network
- work station network
- world-wide communication network
- WS network
- X-network
- Y-network

- acoustic alarm system
- acoustic image system
- acoustic systems
- actiontrack system
- active IR-system
- actuator system
- adaptive communication system
- adaptive teleinformation system
- adaptive telemetering system
- advanced information system
- Afsatcom system
- air system
- aircraft intercommunication system
- airfield communication system
- air-ground automatic system
- airline reservation system
- air-to-ground TV system
- alarm signal system
- alarm system
- all-channel signaling system
- ALL-IN-ONE system
- alphanumeric system
- amplified speaker system
- amplitude shift-keying system
- AMPS system
- analog cellular communication system
- analog cellular system
- analog component video system
- analog television system
- analog tropospheric system
- anisochronous system
- antenna system
- antitheft system
- AR system
- Arabsat system
- ASK system
- associated channel analog system
- asynchronous address communication system
- audio recording system
- Aurora system
- Aussat system
- automatic communication system
- automatic connection establishment system
- automatic control system
- automatic data acquisition system
- automatic telegraphy system
- automatic telephone system
- automatic tuning system
- automatized cellular system
- auxiliary alarm system
- balanced cable transmission system
- band sharing system
- base station system
- baseband system
- basic input/output system
- bass-reflex speaker system
- batch processing system
- batch transmission system
- batch-and-forward system
- batteryless system
- bilateral CTV system
- binary tariff system
- biocontrol system
- bit parallel interface system
- bit transport system
- bridge duplex system
- broadband mobile system
- broadcast satellite system
- broadcasting delivery media systems
- burglar alarm system
- byte-serial interface system
- cabinet system
- cabinetless system
- cable distribution system
- cable TV system
- call-accounting system
- call-answering system
- call-counting system
- call-distributing system
- call-processing system
- call-queueing system
- camp-on system
- CAPTAIN system
- car component audio system
- carrier reinsertion system
- carrier system
- carrier-communication system
- carrier-current communication system
- Cassegrain-Schmidt system
- cassette recording system
- cassette reproducing system
- CATRIN system
- caution system
- CD 900 system
- cellular system
- cellular-radio system
- central-battery system
- centralized control system
- chirp binary telegraph system
- cipher system
- circuit switched telecommunication system
- circuit switching telecommunication system
- circular telecontrol system
- clock system
- closed-circuit communication system
- closed-circuit telegraph system
- closed-numbering system
- code-dependent system
- code-division multiple access system
- code-independent system
- code-insensitive system
- code-sensitive system
- coding system
- coherent fiber-optic system
- collimating system
- collocated system
- color separating system
- combined numbering system
- combined power supply system
- combined satellite communication system
- common-battery system
- common-carrier system
- common-channel signaling system
- common-engineering communication system
- common-purpose cellular system
- common-using band system
- common-using cordless telephone system
- common-using paging system
- communication system
- communication traffic system
- communications system
- community antenna system
- community antenna television system
- community TV-system
- commununication switching system
- compact disk digital audio system
- compatible color television system
- compatible single sideband system
- compatible single-band system
- compatible TV-system
- complex radio communication system
- computer vision system
- computer-telephone system
- Comsar system
- Comsat system
- Conax system
- concentrated-insonation system
- conference system
- conference-communication system
- congested system
- congress-class system
- constant-current system
- control generating system
- conventional television system
- Conversant system
- cordless-communication system
- crossbar system
- crossed-coincident microphone system
- Crosspoint system
- CSE system
- C-system
- cubical video projecting system
- data processing system
- data system
- data transport system
- data-collection system
- data-compression system
- data-exchange system
- dataflow system
- data-gathering system
- data-handling system
- data-measuring system
- data-reduction system
- data-transmission system
- Decca Navigator system
- DECfax system
- decision-feedback system
- dedicated control channel system
- dedicated multimedia system
- delta-sigma system
- deluxe presentation system
- departmental communication system
- desktop-video system
- DFS/Copernicus system
- dial-telephone system
- differential phase shift-keying system
- differential-duplex system
- differential-magnetic system
- digital camera system
- digital hybrid-key telephone system
- digital mass storage system
- digital microwave radio transmission system
- digital telephone communication system
- digital transmission system
- digital TV-communication system
- Digital UNIX system
- digital-analog system
- digital-cellular system
- digital-data modulation system
- digital-effect system
- digital-message entry system
- digital-termination system
- direct-broadcasting satellite system
- directing system
- direct-modulation system
- direct-sequence system
- direct-telephone communication system
- discrete communication system
- discrete sound system
- discrete-addressing system
- disk-operating system
- DISOSS system
- dispatch telephone communication system
- dispatch-center system
- dispersed-insonation system
- distributed-insonation system
- distributed-processing system
- documental-type communication system
- Dolby systems
- domestic satellite communication system
- double-band telephone communication system
- double-channel transmission system
- double-current transmission system
- double-pole communication system
- double-sideband large carrier system
- DSCS system
- D-system
- dual-cable system
- dual-reflector system
- duplexed system
- Earth-to-space transmission system
- ECM system
- electric communication system
- electronic antishock system
- electronic data-gathering system
- electronic data-processing system
- electronic-message system
- electronic-scanning system
- electronic-switching system
- Ellipso system
- emergency telephone communication system
- emergency-broadcast system
- EMX system
- equidistant system
- error-correction system
- error-detection system
- Eutelsat system
- extensible system
- external paging system
- facsimile system
- fast-acting servicing system
- fault-tolerant system
- fax communication system
- fax transmitting system
- feed system
- fiber transmission system
- fiber-optic transmission system
- field-sequential system
- final mile system
- finishing system
- fire alarm system
- fire warning system
- first generation cellular system
- five-channel communication system
- fixed satellite system
- Flexcam system
- flexible access system
- Flitsatcom system
- focusing system
- four-channel sound system
- four-dimensional system
- four-wire telephone communication system
- frame-sequential system
- frequency shift-keying system
- frequency-carrier system
- frequency-control system
- front-bass reflex speaker system
- fully digital system
- gate system
- Gaussian system
- generalized system
- generating dynamic system
- generator-dc-motor system
- GIGASET radio system
- global positioning system
- Global system
- Gopher system
- grandfathered system
- group-alerting and dispatching system
- guide system
- hard-wired CCTV system
- hazard system
- helical-scan system
- HF-synchronizing system
- high-precision navigating system
- Hi-linear system
- home system
- home-telephone system
- home-type system
- homing-guidance system
- host system
- hydroacoustic system
- ideal communication system
- idealized system
- image informaion system
- image-forming system
- immedial servicing system
- incompatible system
- independent system
- information retrieval system
- information system radio system
- information system
- information-feedback system
- information-measuring system
- infrared alarm system
- Inmarsat system
- Inmarsat-A system
- Inmarsat-B system
- Inmarsat-C system
- Inmarsat-D system
- Inmarsat-M system
- Inmarsat-P system
- integrated telephone system
- integrated videographic teleconferencing system
- integrated-antenna system
- integrated-communication system
- integrated-modulation system
- integrated-office system
- Intelsat system
- interactive system
- intercarrier-sound system
- intercommunication system
- intercontinental tropospheric system
- interlock system
- intermachine exchange system
- intermediate system
- international communication system
- interphone system
- Intervision system
- intraband signaling system
- intruder alarm system
- inward-outward dialing system
- ionoscatter system
- ionosphere sounder system
- ionospheric system
- Iridium system
- isolated system
- Italsat system
- J-carrier system
- joint-multichannel trunking and switching system
- K-carrier system
- key system
- key-telephone system
- land satellite communication system
- large-grained communication system
- laser communication system
- L-band satellite system
- L-carrier system
- Leasat system
- lightning protection system
- limited distortion system
- line amplifiers system
- link system
- little-channel relay system
- local alarm system
- local battery system
- local communication system
- local radio paging system
- long-haul system
- long-range system
- loop system
- loud-speaking communication system
- low-traffic system
- magnetic tape recording system
- Mail system
- management-information system
- manual cellular system system
- manual telephone set system
- Marisat system
- master television system
- master-antenna television system
- matrix sound system
- message feedback system
- message procession system
- message registration system
- message-switched system
- meteor radio system
- Metrobus system
- micro component system
- Micro Press Cluster Printing system
- micro-lens system
- microprocessor system
- microwave relay system
- midi system
- mine radio telephone system
- mini system
- mixed media system
- mixed numbering system
- mobile cellular communication system
- mobile land communication system
- mobile radio system
- mobile relay system
- mobile system
- modulated system
- monetary mobile system
- MS-Mail system
- multiareal system
- multicassette system
- multichannel telephone system
- multicomputer system
- multidisk system
- multiformat recording system
- multifrequency tone signaling system
- multiguard system
- multilevel mixed system
- multimedia system
- multiple-channel system
- multiqueue system
- Multiscrypt system
- multistandard system
- multitrack editing system
- mutibeam antenna system
- muting system
- Nagravision system
- NAMTS system
- narrow-angle TV system
- national communication system
- navigation system
- n-channel communication system
- n-channel DPSK system
- n-channel transmission system
- network standalone system
- network system
- network-operation system
- networks numbering system
- neutral direct-current telegraph system
- n-head video system
- NMT system
- noise-reduction system
- nonhoming tuning system
- noninterlaced television system
- nonsegmented system
- Norsat system
- n-satellite system system
- n-tone DPSK system
- n-tone MFSK system
- NTSC system
- NTT system
- obligatory message system
- Odyssey system
- off-line system
- on-line computer system
- on-line secured system
- open numbering system
- open system
- operative-engineering communication system
- opposite signals system
- optical-communication system
- optical-information system
- optical-projection system
- optoelectronic system
- oscillating system
- oscillation system
- outband signaling system
- package-and-resource tracking system
- pagemaster system
- paging system
- PAL system
- parametric system
- PATHWORKS system
- pattern recognition system
- personal holding guard system
- phase shift-keying system
- phone system
- Piccolo system
- pilot-controller system
- polar direct-current telegraph system
- portable mobile system
- power control system
- power controlling system
- power-line carrier system
- power-supply system
- press-to-talk system
- Prestel system
- primary-supply system
- privacy system
- private branch paging system
- private movable system
- private videodata system
- private videotex system
- process-interface system
- PROFS system
- programmable cross-connect system
- programmable cross-connected system
- programmed radio system
- prompting system
- protected wireline distribution system
- protection system
- pseudoquadraphony system
- pseudotrunking system
- public videodata system
- public videotex system
- pulse-code system
- pulse-frequency system
- pulse-time system
- quadraphonic sound system
- quadruple-diversity system
- R1 system
- R2 system
- radio buoy system
- radio command system
- radio communication system
- Radio Data system
- radio facsimile system
- Radiocom 2000 system
- radio-control system
- radio-paging system
- radio-relay system
- radiosonde-radio-wind system
- radio-telemetering system
- real time pulse-echo system
- real time system
- receiver lockout system
- recording system
- recovery system
- redundant system
- reference-information system
- regional electronic payment system
- relay-radio system
- remote concentrating system
- remote control system
- remote diagnostic system
- remote information system
- remote semiconcentrating system
- remote sensing system
- remote signaling system
- rendering system
- rerecording system
- reserved servicing system
- RF/Transmission system
- rotary system
- safety alarm system
- safety system
- Satcom system
- satellite comminication system
- satellite marine comminication system
- Satellite Master Antenna Television system
- satellite radio system
- satellite-aircraft communication system
- SB-communication system
- SBL communication system
- scalable system
- scanning trunking system
- SCO UNIX system
- searchless identification system
- seat reservation system
- SECAM system
- second generation cellular system
- second room system
- secondary supply system
- secrecy system
- section communication system
- security system
- segmented system
- seismic system
- selective calling system
- selective frequency base station system
- selective protective system
- selective telephone system
- self-adjusting system
- self-balancing differential system
- self-contained system
- self-test system
- selsyn system
- semiautomatic-switching system
- semiautomatized cellular system
- sensory system
- servo system
- shadow-batch system
- short-haul microwave system
- Sicral system
- Sigma Servo system
- signal system
- simplex movable system
- single-band transmission system
- single-busbar system
- single-cable communication system
- single-cable system
- single-channel system
- single-current transmission system
- single-pulse tracking system
- Skynet system
- small-grained communication system
- SmarTrunk II radio communication system
- solid-state uninterruptible power battery system
- Sony bus system
- sound alarm system
- sound equalization system
- sound navigation system
- sound reinforcement system
- sound warning system
- space-division system
- space-switched system
- spark-safe system
- speaker system
- special communication system
- speech-processing system
- speech-recognition system
- split-speaker system
- spread-spectrum system
- stabilizing system
- stage monitoring system
- standalone double point system
- star-circuit system
- STAREX CMX system
- starting communication system
- start-stop system
- stationary satellite system
- step-by-step system
- stereo sound system
- stereophonic sound system
- storage system
- storage-and-retrieval system
- Strowger system
- submarine fiber-optic system
- subprimary digital transmission system
- subscriber carrier system
- subscriber switching system
- suffix system
- Supersat system
- supervisory control system
- surround sound system
- switched telecommunication system
- switching system
- sync communication system
- synchro system
- synchronous communication system
- synchronous digital system
- TAGS system
- tandem system
- tariffication system
- T-carrier system
- TDF system
- teleautomatic system
- Telecom system
- telecommunication system
- telecommunications system
- telecommunication-service priority system
- telecommunications-service priority system
- telecontrol system
- telemechanic system
- telemetering system
- telemetry system
- telephone system
- telephone-answering system
- telephone-communication system
- telephone-communications system
- teleprocessing system
- Telesat system
- teletex system
- teletypewriter system
- television-telephone system
- Tele-X system
- Telsar system
- terminal system
- terrestrial radio-relay system
- theft-prevention system
- thin-route system
- third generation communication system
- three-axle stabilizing system
- three-channel HF-telephone system
- three-channel transmission system
- three-color system
- three-lens optical system
- three-primary system
- three-wire system
- time-dissemination system
- time-frequency hopping system
- time-switched system
- total access communication system
- total area coverage system
- transmission system
- trichromatic system
- triple-interlace system
- triplex system
- trunk communication system
- TV-observation system
- twelve-channel transmission system
- two-arm system
- two-band system
- two-color system
- two-roller transfer system
- two-step control system
- two-way CATV system
- two-way system
- two-wire telephone communication system
- ultra-match system
- ULTRIX system
- unified radioaccess system
- unilateral-control system
- unilateral-synchronization system
- uninterruptible-power system
- Unisat system
- universal alarm system
- universal-battery system
- universal-electronic system
- universal-movable system
- Uniworks system
- vestigial-sideband system
- video editing system
- video home system
- video recording system
- videocom system
- videoteleconference system
- videotex system
- virtual studio system
- vision system
- vocoder system
- voice dialog system
- voice frequency carrier telegraph system
- voice modulation system
- voice post system
- volume control system
- waiting system
- warning system
- watch system
- watching system
- waterside facsimile communication system
- wave-propagating system
- wide-angle TV system
- Winfax Pro system
- wired broadcasting system
- wireless CCTV system
- wireless home system
- wireless infrared speaker system
- wire-radio communication system
- XY system
- zone-selective protection system
- zoning system