a ca - adc
- a call is answered
- a call is sent
- a class videotelephone communication
- a priori probability
- aa curtain
- aa with horn radiators
- abandon production
- abate noise
- aberration
- aberration affects image quality
- aberration deteriorates image credibility
- aberration worsens image truth
- abnormal dispersion
- abnormal propagation
- abrasive tape
- abrupt junction
- abscissas axis of the plot
- absolute accuracy
- absolute calibration
- absolute error
- absolute instability
- absolute level
- absolute magnitude
- absolute permeability
- absolute temperature
- absolute unit
- absolute value
- absolute zero
- absorb heat
- absorb light
- absorb photon
- absorb power
- absorb radiation
- absorb rays
- absorbed color
- absorbed heat
- absorbed photon
- absorbed power
- absorber
- absorber of radio waves
