Half-inch tape is magnetic tape with a width of in a format such as:
Computer magnetic tape data storage Reel-to-reel UNISERVO IBM 7 track IBM 9 track Cartridge IBM 3480 IBM 3590 IBM 3592 Digital Linear Tape (DLT) Linear Tape-Open (LTO) Videotape Reel-to-reel CV-2000 EIAJ-1 Video cassette Betacam Betamax VHS S-VHS