The T64 file format is an archive format used to store Commodore 64 software that was originally distributed on cassette tapes. It's essentially a container that holds the data from the tape, allowing users to load and run these programs on emulators or, with specialized hardware, on original Commodore 64 machines. The format typically contains the program code, data, and any necessary loading instructions. T64 files are smaller and more convenient than storing the original tapes, making them a popular way to preserve and distribute Commodore 64 software. They are widely used in the Commodore 64 emulation scene. The format is relatively simple, making it easy to create and manipulate. It's a crucial part of preserving the legacy of Commodore 64 software, allowing future generations to experience the games and programs of that era. The T64 format is a lossless representation of the tape data, ensuring that the software is preserved accurately. While not as feature-rich as some other archive formats, its simplicity and compatibility with Commodore 64 emulators make it an invaluable tool for retro computing enthusiasts.