SUBJECT
Recording and reproducing
Sound
20
Electronic books
5
Sound studios
5
Digital techniques
4
Equipment and supplies
4
Production and direction
3
Sound recordings
3
Design and construction
2
History
2
Motion pictures
2
Music
2
Radio
2
Amateurs' manuals
1
Automatic speech recognition
1
Data processing
1
Digital watermarking
1
History and criticism
1
Home video systems
1
Magnetic recorders and recording
1
Mass media
1
Mass media and history
1
Multimedia systems
1
Music trade
1
Ownership
1
Phonograph
1
Radio stations
1
Security measures
1
Signal processing
1
Sound effects
1
Sound motion pictures
1
Sound recording industry
1
Speech processing systems
1
Stereophonic sound systems
1
Technological innovations
1
Television broadcasting
1
Video recording
1