discrete digital input

- coded representation
- data representation
- digital representation
- discrete representation
- input representation
- output representation
- quasi-optimal digital representation

- 2-handed controls
- 32-bit CPU control
- acceptance control
- access control
- acknowledge control
- active process control
- adaptable control
- adaptive constraint control
- adaptive control for optimization
- adaptive control
- adaptive feed rate control
- adaptive quality control
- adjustable feed control
- adjustable rotary control
- adjustable speed control
- adjusting control
- adjustment control
- AI control
- air logic control
- analog data distribution and control
- analogical control
- analytical control
- application control
- arrows-on-curves control
- autodepth control
- autofeed control
- automated control of a document management system
- automated technical control
- automatic backlash control
- automatic control
- automatic editing control
- automatic gain control
- automatic gripper control
- automatic level control
- automatic process closed loop control
- automatic remote control
- automatic sensitivity control
- automatic sequence control
- automatic speed control
- automatic stability controls
- auxiliaries control
- balanced controls
- band width control
- bang-bang control
- bang-bang-off control
- basic CNC control
- batch control
- bibliographic control
- bin level control
- boost control
- built-in control
- button control
- cam control
- cam throttle control
- camshaft control
- carriage control
- Cartesian path control
- Cartesian space control
- cascade control
- C-axis spindle control
- cell control
- center control
- central control
- central supervisory control
- centralized control
- centralized electronic control
- central-station control
- changeover control
- chip control
- circumferential register control
- close control
- closed cycle control
- closed loop control
- closed loop machine control
- closed loop manual control
- closed loop numerical control
- closed loop position control
- clutch control
- CNC control
- CNC indexer control
- CNC programmable control
- CNC symbolic conversational control
- CNC/CRT control
- CNC/MDI control
- coarse control
- coded current control
- coded current remote control
- color control
- combination control
- command-line control
- compensatory control
- composition control
- compound control
- computed-current control
- computed-torque control
- computer control
- computer numerical control
- computer process control
- computer-aided measurement and control
- computer-integrated manufacturing control
- computerized control
- computerized numerical control
- computerized process control
- constant surface speed control
- constant value control
- contactless control
- contact-sensing control
- contamination control
- continuous control
- continuous path control
- continuous process control
- contour profile control
- contouring control
- conventional hardware control
- conventional numerical control
- conventional tape control
- convergent control
- conversational control
- conversational MDI control
- coordinate positioning control
- coordinate programmable control
- copymill control
- counter control
- crossed controls
- current control
- cycle control
- dash control
- data link control
- data storage control
- deadman's handle controls
- depth control
- derivative control
- dial-in control
- differential control
- differential gaging control
- differential gain control
- differential temperature control
- digital brushless servo control
- digital control
- digital position control
- digital readout controls
- dimensional control
- direct computer control
- direct control
- direct digital control
- direct numerical control
- direction control
- directional control
- dirt control
- discontinuous control
- discrete control
- discrete event control
- discrete logic controls
- dispatching control
- displacement control
- distance control
- distant control
- distributed control
- distributed numerical control
- distributed zone control
- distribution control
- dog control
- drum control
- dual control
- dual-mode control
- duplex control
- dust control
- dynamic control
- eccentric control
- edge position control
- EDP control
- electrical control
- electrofluidic control
- electromagnetic control
- electronic control
- electronic level control
- electronic speed control
- electronic swivel control
- elevating control
- emergency control
- end-point control
- engineering change control
- engineering control
- entity control
- environmental control
- error control
- error plus error-rate control
- error-free control
- external beam control
- factory-floor control
- false control
- feed control
- feed drive controls
- feedback control
- feed-forward control
- field control
- fine control
- finger-tip control
- firm-wired numerical control
- fixed control
- fixed-feature control
- fixture-and-tool control
- flexible-body control
- floating control
- flow control
- fluid flow control
- follow-up control
- foot pedal control
- force adaptive control
- forecasting compensatory control
- fork control
- four quadrant control
- freely programmable CNC control
- frequency control
- FROG control
- full computer control
- full order control
- full spindle control
- gage measurement control
- gain control
- ganged control
- gap control
- gear control
- generative numerical control
- generic path control
- geometric adaptive control
- graphic numerical control
- group control
- grouped control
- guidance control
- hairbreath control
- hand control
- hand feed control
- hand wheel control
- hand-held controls
- handle-type control
- hand-operated controls
- hardened computer control
- hardwared control
- hardwared numerical control
- heating control
- heterarchical control
- hierarchical control
- high-integrity control
- high-level robot control
- high-low control
- high-low level control
- high-technology control
- horizontal directional control
- humidity control
- hybrid control
- hydraulic control
- I/O control
- immediate postprocess control
- inching control
- in-cycle control
- independent control
- indexer control
- indirect control
- individual control
- industrial processing control
- industrial-style controls
- infinite control
- infinite speed control
- in-process control
- in-process size control
- in-process size diameters control
- input/output control
- integral CNC control
- integral control
- integrated control
- intelligent control
- interacting control
- interconnected controls
- interlinking control
- inventory control
- job control
- jogging control
- joint control
- joystick control
- just-in-time control
- language-based control
- laser health hazards control
- latching control
- lead control
- learning control
- lever control
- lever-operated control
- line motion control
- linear control
- linear path control
- linearity control
- load control
- load-frequency control
- local control
- local-area control
- logic control
- lubricating oil level control
- machine control
- machine programming control
- machine shop control
- macro control
- magnetic control
- magnetic tape control
- main computer control
- malfunction control
- management control
- manual control
- manual data input control
- manual stop control
- manually actuatable controls
- manufacturing change control
- manufacturing control
- master control
- material flow control
- MDI control
- measured response control
- mechanical control
- memory NC control
- memory-type control
- metering control
- metrological control of production field
- microbased control
- microcomputer CNC control
- microcomputer numerical control
- microcomputer-based sequence control
- microprocessor control
- microprocessor numerical control
- microprogrammed control
- microprogramming control
- milling control
- model reference adaptive control
- model-based control
- moisture control
- motion control
- motor control
- motor speed control
- mouse-driven control
- movable control
- multicircuit control
- multidiameter control
- multilevel control
- multimachine tool control
- multiple control
- multiple-processor control
- multiposition control
- multistep control
- multivariable control
- narrow-band proportional control
- navigation control
- NC control
- neural network adaptive control
- noise control
- noncorresponding control
- noninteracting control
- noninterfacing control
- nonreversable control
- nonsimultaneous control
- numerical contouring control
- numerical control
- numerical program control
- odd control
- off-line control
- oligarchical control
- on-board control
- one-axis point-to-point control
- one-dimensional point-to-point control
- on-line control
- on-off control
- open loop control
- open loop manual control
- open loop numerical control
- open-architecture control
- operating control
- operational control
- operator control
- optical pattern tracing control
- optimal control
- optimalizing control
- optimizing control
- oral numerical control
- organoleptic control
- overall control
- overheat control
- override control
- p. b. control
- palm control
- parameter adaptive control
- parameter adjustment control
- partial d.o.f. control
- path control
- pattern control
- pattern tracing control
- PC control
- PC-based control
- peg board control
- pendant control
- pendant-actuated control
- pendant-mounted control
- performance control
- photoelectric control
- physical alignment control
- PIC control
- PID control
- plugboard control
- plug-in control
- pneumatic control
- point-to-point control
- pose-to-pose control
- position/contouring numerical control
- position/force control
- positional control
- positioning control
- positive control
- postprocess quality control
- power adaptive control
- power control
- power feed control
- power-assisted control
- powered control
- power-operated control
- precision control
- predictor control
- preselective control
- preset control
- presetting control
- pressbutton control
- pressure control
- preview control
- process control
- process quality control
- production activity control
- production control
- production result control
- programmable adaptive control
- programmable cam control
- programmable control
- programmable logic adaptive control
- programmable logic control
- programmable machine control
- programmable microprocessor control
- programmable numerical control
- programmable sequence control
- proportional plus derivative control
- proportional plus floating control
- proportional plus integral control
- prototype control
- pulse control
- pulse duration control
- punched-tape control
- purpose-built control
- pushbutton control
- quality control
- radio remote control
- radium control
- rail-elevating control
- ram stroke control
- ram-positioning control
- rapid-traverse controls for the heads
- rate control
- ratio control
- reactive control
- real-time control
- reduced-order control
- register control
- registration control
- relay control
- relay-contactor control
- remote control
- remote program control
- remote switching control
- remote valve control
- remote-dispatch control
- resistance control
- resolved motion rate control
- retarded control
- reversal control
- revolution control
- rigid-body control
- robot control
- robot perimeter control
- robot teach control
- rod control
- safety control
- sampled-data control
- sampling control
- schedule control
- SCR's control
- second derivative control
- selective control
- selectivity control
- self-acting control
- self-adaptive control
- self-adjusting control
- self-aligning control
- self-operated control
- self-optimizing control
- self-programming microprocessor control
- semi-automatic control
- sensitivity control
- sensor-based control
- sequence control
- sequence-type control
- sequential control
- series-parallel control
- servo control
- servo speed control
- servomotor control
- servo-operated control
- set value control
- shaft speed control
- shape control
- shift control
- shop control
- shower and high-pressure oil temperature control
- shut off control
- sight control
- sign control
- single variable control
- single-flank control
- single-lever control
- size control
- slide control
- smooth control
- software-based NC control
- softwared numerical control
- solid-state logic control
- space-follow-up control
- speed control
- stabilizing control
- stable control
- standalone control
- start controls
- static control
- station control
- statistical quality control
- steering control
- step-by-step control
- stepless control
- stepped control
- stick control
- stock control
- stop controls
- stop-point control
- storage assignment control
- straight cut control
- straight line control
- stroke control
- stroke length control
- supervisor production control
- supervisory control
- swarf control
- switch control
- symbolic control
- synchronous data link control
- table control
- tap-depth controls
- tape control
- tape loop control
- teach controls
- temperature control
- temperature-humidity air control
- template control
- tension control
- test control
- thermal control
- thermostatic control
- three-axis contouring control
- three-axis point-to-point control
- three-axis tape control
- three-mode control
- three-position control
- throttle control
- thumbwheel control
- time control
- time cycle control
- time optimal control
- time variable control
- time-critical control
- time-proportional control
- timing control
- token-passing access control
- tool life control
- tool run-time control
- torque control
- total quality control
- touch-panel NC control
- touch-screen control
- tracer control
- tracer numerical control
- trajectory control
- triac control
- trip-dog control
- TRS/rate control
- tuning control
- turnstile control
- two-axis contouring control
- two-axis point-to-point control
- two-dimension control
- two-hand controls
- two-position control
- two-position differential gap control
- two-step control
- undamped control
- user-adjustable override controls
- user-programmable NC control
- variable flow control
- variable speed control
- variety control
- varying voltage control
- velocity-based look-ahead control
- vise control
- vision responsive control
- visual control
- vocabulary control
- vocal CNC control
- vocal numerical control
- voltage control
- warehouse control
- washdown control
- water-supply control
- welding control
- wheel control
- wide-band control
- zero set control
- zoned track control

- 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