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ANSI IT7.223 94th Edition, 1999 AUDIOVISUAL SYSTEMS - OVERHEAD PROJECTORS WITH 254 X 254 MM (10 X 10 IN) STAGE - TEST TRANSPARENCY
ANSI IT7.224 1991 Edition, 1991 SLIDE PROJECTORS - DETERMINATION OF TEMPERATURE RISE IN THE PICTURE AREA USING A GLASS SANDWICH TEST SLIDE
ANSI IT7.225 91st Edition, 1996 AUDIOVISUAL SYSTEMS (PHOTOGRAPHY) - OVERHEAD PROJECTORS - METHODS FOR MEASURING AND REPORTING PERFORMANCE CHARACTERISTICS
ANSI IT7.227 1998 Edition, November 11, 1998 AUDIOVISUAL SYSTEMS - ELECTRONIC PRODUCTION - VARIABLE RESOLUTION PROJECTORS
ANSI IT7.228 1997 Edition, February 13, 1997 AUDIOVISUAL SYSTEMS - ELECTRONIC PROJECTION - FIXED RESOLUTION PROJECTORS
ANSI IT7.230 1998 Edition, 1998 AUDIOVISUAL SYSTEMS - FRONT IMAGING PROJECTION SCREENS - METHOD FOR MEASURING SCREEN GAIN
ANSI IT7.231 1998 Edition, 1998 AUDIOVISUAL SYSTMS - PROJECTION IN INDOOR ROOMS - PART 1: SCREEN ILLUMINATION TEST FOR STILL PROJECTORS
ANSI IT7.232 1998 Edition, 1998 AUDIOVISUAL SYSTEMS - PROJECTION IN INDOOR ROOMS - PART 2: SCREEN LUMINANCE TEST FOR STILL AND VIDEO PROJECTION
ANSI IT7.401 1989 Edition, 1989 AUDIOVISUAL SYSTEMS - LABELLING FOR EDUCATIONAL AUDIO CASSETTES
ANSI IT7.402 1997 Edition, 1997 AUDIOVISUAL SYSTEMS - SOUND SYSTEM EQUIPMENT - PART 15: PREFERRED MATCHING VALUES FOR THE INTERCONNECTIN OF SOUND SYSTEM COMPONENTS
ANSI IT7.404 1997 Edition, 1997 AUDIOVISUAL SYSTEMS - AUDIO CASSETTES - SYNCHRONIZATION SYSTEMS FOR TAPES/SLIDES/FILMSTRIPS
ANSI IT7.405 94th Edition, 1999 AUDIOVISUAL SYSTEMS - AUDIO RECORDED MAGNETICALLY STRIPED INFORMATION CARDS