Non-broadcast video tape recorders - Methods of measurement - Part 4: Calibration tape (NTSC/PAL/SECAM)
Electroacoustics - Measurement microphones - Part 2: Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique
Electroacoustics - Measurement microphones - Part 2: Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique
Electroacoustics - Measurement microphones - Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
Electroacoustics - Measurement microphones - Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
Electroacoustics - Measurement microphones - Part 5: Methods for pressure calibration of working standard microphones by comparison
Digital audio tape cassette system (DAT) - Part 2: DAT calibration tape
Electroacoustics - Random-incidence and diffuse-field calibration of sound level meters
End-face image analysis procedure for the calibration of optical fibre geometry test sets
Calibration of optical time-domain reflectometers (OTDR) - Part 1: OTDR for single-mode fibres
Calibration of optical time-domain reflectometers (OTDR) - Part 1: OTDR for single-mode fibres
Calibration of optical time-domain reflectometers (OTDR) - Part 2: OTDR for multimode fibres
53,361 distinct reference strings indexed from official source snapshots accessed on 19 October 2026. Includes earlier editions. The index and publisher collections have different coverage. See sources and coverage.