The T64 file extension represents a Commodore 64 Tape Image, a specialized format used primarily by emulators to replicate the data stored on physical cassette tapes used by the Commodore 64 (C64) 8-bit home computer. Originally developed for the C64S emulator, the T64 format serves as a container or a 'wrapper' for one or more files that would have been recorded onto a tape. Unlike the TAP format, which provides a low-level, bit-for-bit representation of the magnetic pulses on a physical tape, the T64 format is a high-level representation that stores the actual program data along with a header. This header contains metadata such as the tape's name, the number of files included, and the start/end addresses for each program. Because it is more structured and compact than raw tape captures, it is a popular choice for distributing retro games and software. Users typically load these files into modern emulators to run legacy software on contemporary hardware, preserving the digital heritage of the 1980s computing era.