- A (amp)
- Ampere
- AC
- Alternating current
- AC/DC
- Alternating current / direct current
- A/D
- Analog to digital
- ADC
- Analog-to-digital converter
- AF
- Audio frequency
- AFT
- Automatic fine tunung
- AFC
- Automatic frequency control
- AFC
- Automatic flow controller, used in controlling the flow of gasses
under pressure into a vacuum system
- AGC
- Automatic gain control
- Ah
- Ampere hour
- Ai
- Current gain
- AM
- Amplitude modulation
- AM/FM
- Amplitude modulation or Frequency modulation
- AMM
- Analog multimeter
- antilog
- Antilogarithm
- Ap
- Power gain
- apc
- Automatic phase control
- Av
- Voltage gain
- AVC
- Automatic volume control
- AWG
- American wire gauge
- B
- Flux density
- BCD
- Binary coded decimal
- bfo
- Beat frequency oscillator
- BJT
- Bipolar junction transistor
- BW
- Bandwidth
- c
- Centi (10-2)
- C
- Capacitance or capacitor
- CAD
- Computer aided design
- CAM
- Computer aided manufacture
- CATV
- Cable TV
- CB
- Common base configuration
- CB
- Citizen's band
- CC
- Common collector
- CE
- Common emitter
- cm
- Centimeter
- cmil
- Circular mil
- CPU
- Central processing unit
- C (Q)
- Coulomb
- CR cr
- Junction diode
- CRO
- Cathode ray oscilloscope
- CRT
- Cathode ray tube
- CT
- Total capacitance
- cw
- Continuous transmission
- d
- Deci (10
-1)
- D/A or D-A
- Digital to analog
- DC
- Direct current
- Di or Di
- Change in current
- DIP
- Dual in-line package
- DMM
- Digital multimeter
- DPDT
- Double pole double throw
- Dt or Dt
- Change in time
- DTL
- Diode transistor logic
- Dv or Dv
- Change in voltage
- DVM
- Digital voltmeter
- E DC or
Erms
- Difference in potential
- e
- Instantaneous difference in potential
- ECG
- Electrocardiogram
- ECL
- Emitter coupled logic
- EHF
- Extremely high frequency
- EHV
- Extra high voltage
- ELF
- Extremely low frequency
- EMF
- Electromotive force
- EMI
- Electromagnetic interference
- EW
- Electronic warfare
- f
- Frequency
- FET
- Field effect transistor
- FF
- Flip Flop
- fil
- Filament
- FM
- Frequncy modulation
- fr
- Frequency at resonance
- fsk
- frequency-shift keying
- FSD
- Full scale deflection
- G
- Gravitational force
- G
- Conductance
- G
- Giga (109 )
- H
- Henry
- H
- Magnetic field intensity
- H
- Magnetizing flux
- h
- hecto (102 )
- h
- Hybrid
- HF
- High frequency
- hp
- Horsepower
- Hz
- Hertz
- I
- Current
- i
- Instantaneous current
- IB
- DC Base current
- IC
- DC Collector current
- IC
- Integrated circuit
- Ie
- Total emitter current
- Ieff
- Effective current
- IF
- Intermediate frequency
- Imax
- Maximum current
- Imin
- Minimum current
- I/O
- Input/output
- IR
- Infrared
- IR
- Resistor current
- IS
- Secondary current
- IT
- Total current
- JFET
- Junction field effedt transistor
- K
- Coefficient of coupling
- k
- Kilo (103 )
- kHz
- Kilohertz
- kV
- Kilovolt
- kVA
- Kilovoltampere
- kW
- Kilowatt
- kWh
- Kilowatt-hour
- L
- Coil, inductance
- LC
- Inductance-capacitance
- LCD
- Liquid crystal display
- L-C-R
- Inductance-capacitance-resistance
- LDR
- Light-dependent resistor
- LED
- Light emitting diode
- LF
- Low frequency
- LM
- Mutual inductance
- LNA
- Low noise amplifier
- LO
- Local oscillator
- LSI
- Large scale integration
- LT
- Total inductance
- M
- Mega (106 )
- M
- Mutual conductance
- MI
- Mutual inductance
- m
- Milli (10-3 )
- mA
- Milliampere
- mag
- Magnetron
- max
- Maximum
- MF
- Medium frequency
- mH
- Millihenry
- MHz
- Megahertz
- min
- Minimum
- mm
- Millimeter
- mmf
- Magnetomotive force
- MOS
- Metal oxide semiconductor
- MOSFET
- Metal oxide semiconductor field effect transistor
- MPU
- Microprocessor unit
- MSI
- Medium scale integrated circuit
- mV
- Millivolt
- mW
- Milliwatt
- N
- Number of turns in an inductor
- N
- Revolutions per minute
- n
- Nano (10-9)
- N
- Negative
- nA
- Nanoampere
- NC
- Normally closed
- NC
- No connection
- NEG, neg
- Negative
- nF
- Nanofarad
- nH
- Nanohenry
- nm
- Nanometer
- NO
- Normally open
- NPN
- Negative-positive-negative
- ns
- Nanosecond
- nW
- Nanowatt
- OP AMP
- Operational amplifier
- P
- Pico (10-12)
- P
- Power
- p
- Instantaneous power
- P
- Positive, also peak
- PA
- Public address or power amplifier
- pA
- Picoampere
- PAL
- Programmable Array Logic
- PAM, pam
- Pulse amplitude modulation
- Pap
- Apparent power
- Pav
- Average power
- PCB
- Printed circuit board
- PCM, pcm
- Pulse-code modulation
- PDM
- Pulse-duration modulation
- pF
- Picofarad
- PLD
- Programmable Logic Device
- PLL
- Phase locked loop
- PM
- Phase modulation, also Permanent magnet
- PNP
- Positive-negative-positive
- POT, pot
- Potentiometer
- P-P
- Peak to peak
- PPM
- Pulse-position modulation
- PRF
- Pulse repetition frequency
- PRT
- Pulse repetition time
- pw
- Pulse width
- PWM, pwm
- Pulse width modulation
- Q
- Charge, also quality
- q
- Instantaneous charge
- R
- Potentiometer
- R
- Resistance
- RAM
- Random access memory
- RC
- Resistance-capacitance, also Radio controlled
- rcvr
- Receiver
- rect
- Rectifier
- ref
- Reference
- rf
- Radio frequencies
- RF
- Radio frequencies
- RFI
- Radio frequency interference
- RL
- Load resistor
- RLC
- Resistance-capacitance-inductance
- RMS, rms
- Root mean square
- ROM
- Read only memory
- rpm
- Revolutions per minute
- SCR
- Silicon controlled rectifier
- SHF
- Super high frequency
- SIP
- Single in-line package
- SNR
- Signal-to-noise ratio
- SPDT
- Single pole double throw
- sq cm
- Square centimeter
- SSB
- Single sideband
- SW
- Short wave
- SWR
- Standing-wave ratio
- SYNC, sync
- Synchronous
- T
- Tera (1012)
- T
- Torque
- T
- Transformer
- t
- Time in seconds
- TC
- Time constant, also temperature coefficient
- TE
- Transverse electric
- temp
- Temperature
- THz
- Terahertz
- TM
- Transverse magnetic
- TR
- Transmit-receive
- TTL
- Transistor-transistor logic
- TV
- Television
- TWT
- Travelling wave tube
- UHF
- Ultra high frequency
- UHV
- Ultra high voltage
- UJT
- Unijunction transistor
- UV
- Ultraviolet
- V
- Vacuum tube
- V, v
- Volt
- v
- Instantaneous voltage
- VA
- Volt ampere
- Vav
- Voltage (average value)
- VBE
- DC voltage base to emitter
- Vc
- Capacitive voltage
- VCE
- DC voltage collector to emitter
- VCO
- Voltage controlled oscillator
- VHF
- Very high frequency
- Vin
- Input voltage
- VL
- Inductive voltage
- VLF
- Very low frequency
- Vm,
Vmax
- Maximum voltage
- VOM
- Volt ohm milliameter
- Vout
- Output voltage
- Vp
- Primary voltage
- VS
- Source voltage
- VSWR
- Voltage standing wave ratio
- VT
- Total voltage
- W
- Watt
- XC
- Capacitive reactance
- XL
- Inductive reactance
- Y
- Admittance
- Z
- Impedance
- Zin
- Input impedance
- Zo
- Output impedance
- Zp
- Primary impedance
- Zs
- Secondary impedance
- ZT
- Total impedance
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