Although anyone wishing to learn 6502 machine language (ML) will likely find this book instructive and worthwhile, the specific example programs are written to work on five popular personal computers: Apple, Atari, VIC, Commodore 64, and the PET/CBMs. If your computer uses the 6502 microprocessor, but is not one of these machines, you will need to find a "memory map" for your particular machine. These maps - widely available in books and magazines, and from user groups - will allow you to follow and practice with the examples of 6502 machine language throughout this book.