Erik S. Klein's Vintage Computer Collection - Home of historical computers such as Mark-8, Altair, K, Erik S. Klein's Vintage Computer Collection includes such classic systems as Mark-8, Kenbak-1, Apple ][, Apple III, Atari 800, Atari 400, Mits Altair 8800, MITS Altair 8800BT, IMSAI 8080, Processor Technology Sol-20, Osborne 1, Telcon Zorba, Kaypro, Hewlet Packard, IBM PC, Compaq Portable, Commodore Vic-20, PET, Plus/4 and others, Altos ACS 8000, CompuPro, Cromemco and other S-100 and CP/M systems and much more. Collecting, restoring and playing with old computers is my thing! I also take clas.