Commodore 2040 Floppy Disk Drive Test/Demo Disk 197? Commodore VisiCalc 1981 Software Arts PET Assembler 197? <unknown> Petspeed 1982 Small Systems Engineering PET-BOOK 8000 1982 Datatronic PET-ENT 8000 1982 Datatronic PET-GEN 8000 1982 Datatronic PET-LEV 8000 1983 Datatronic