The Commodore PET (Personal Electronic Transactor) was one of the first personal computers, introduced in 1977. It featured a built-in monitor, keyboard, and cassette tape drive for storage, making it a compact and user-friendly option for early computer enthusiasts. The PET was powered by the MOS Technology 6502 microprocessor and came with a BASIC programming language interpreter, allowing users to write and run their own programs. The PET was popular in educational settings and among hobbyists, thanks to its affordability and ease of use. Over the years, it evolved into various models, including the PET 2001 and PET 4000, which offered improvements in memory and graphics capabilities.