Your Super Expander cartridge is the most versatile cartridge you can buy for your VIC 20 Personal Computer. It adds an entirely new set of color, graphics plotting, music and function key commands to your VIC’s vocabulary... AND ... adds 3K extra memory (RAM) so you can write and RUN larger programs! With this cartridge you can plot graphic shapes, “paint” colors on the screen, easily redefine the VIC’s programmable function keys, write music ... and more.