memory+section

- accumulator unit
- actuating unit
- addressing unit
- analog processing unit
- analytic unit
- answerback unit
- answering unit
- antitheft unit
- astronomical unit
- attached unit
- audio response unit
- auto setup unit
- automatic calling unit
- automatic control unit
- automatic network unit
- automatic-dialing unit
- auxiliary memory unit
- auxiliary servicing unit
- bad unit
- balancing unit
- base unit
- basic transmission unit
- bistable unit
- break-contact unit
- built-in heat protecting unit
- burglar-alarm unit
- calibration unit
- calling devices unit
- calling unit
- camera select unit
- camera-channel unit
- camera-control unit
- capacitor unit
- channel service unit
- charging unit
- clocking unit
- command network unit
- command protocol data unit
- communication control unit
- converter unit
- crosstalk unit
- data interface unit
- data transit unit
- data-handling unit
- dc control unit
- decoupling unit
- delay unit
- device control unit
- dial-backup unit
- dialing unit
- digital processing unit
- electronic control unit
- electronic relay unit
- electrostatic units
- exchange-line unit
- exchange-supply unit
- expedited-data unit
- fast-operating unit
- fast-operation unit
- feeding unit
- file-storage unit
- filter unit
- flyaway unit
- frequency conversion unit
- frequency lock-in unit
- frequency selection unit
- Gaussian units
- generator unit
- heat-control unit
- incoming local unit
- incoming toll unit
- incoming-line unit
- independent supply unit
- independent synchronizing unit
- indicator unit
- information unit
- input unit
- integrator unit
- internal unit
- internetworking unit
- junction line unit
- key-telephone unit
- lighting load monitoring unit
- line-connection unit
- lobe-attaching unit
- local unit
- locomotive radio components supply unit
- lone-signal unit
- loudness unit
- magnetic-tape unit
- main control unit
- main fax unit
- main memory unit
- mains synchronizing unit
- matching unit
- media interface unit
- medium attachment unit
- memory unit
- message recording unit
- microprocessor unit
- mine communication supply unit
- modular unit
- motor amplifier unit
- multipath unit
- multiprocessor unit
- multisection switching unit
- network terminating unit
- N-unit
- office interface unit
- off-line unit
- on-door speakers unit
- operational unit
- outgoing line unit
- output unit
- pan/tilt unit
- peripheral unit
- phase-shifting unit
- phasing unit
- power supply unit
- power unit
- printing unit
- processing unit
- program unit
- programming unit
- quad-on-line unit
- quartz crystal unit
- quick-disconnect control unit
- radio frequency unit
- radio station unit
- rectifier unit
- reference generator unit
- regeneration unit
- registrating unit
- relay testing unit
- relay unit
- remote control unit
- remote display unit
- remote subscriber unit
- replacement unit
- request unit
- resistor unit
- retransmission unit
- RF unit
- selective-gain unit
- self-contained unit
- sensing unit
- shared unit
- shared-control unit
- signal processing unit
- six-wire switching unit
- smooth-closing unit
- sound repetitor protection unit
- spark protecting unit
- stabilizator unit
- still picture unit
- storage unit
- studio devices unit
- sub unit
- subscriber's unit
- subundercarrier unit
- supply unit
- switch point operative communication unit
- switching unit
- synchronization signal unit
- system memory unit
- system unit
- tape unit
- telecine unit
- telecontrol unit
- telephone-control unit
- telephone-modulator unit
- teleprompter unit
- temperature-sending unit
- terminal retransmissions unit
- terminal unit
- terrestrial telemechanics unit
- three-wire switching unit
- time-base unit
- traffic unit
- transfer unit
- transit communication unit
- transmissive unit
- transmitting antenna unit
- tributary unit
- two-section switching unit
- undercarrier unit
- underground telemechanics unit
- unit of power
- vibrator unit
- video request unit
- video-out unit
- voice message control unit
- voice recognition unit
- voicememory unit
- writing unit

- band-exclusion filter - band-rejection filter - completely regular filter - correction filter - countably incomplete filter - limited memory filter - linear continuous filter - optimum detecting filter - optimum filter - order convergent filter - piezoelectric ceramic filter - series filter - single pole filter - well symmetric filter