Original 1976 Micro Applications 4K RAM S-100 memory board.The reverse of the PCB is clearly marked “© 1976 BY MICRO APPLICATIONS – 4K RAM.” This is an early S-100 bus memory board from the formative period of hobbyist and personal computing.The board retains its original IC sockets, PCB, gold-plated S-100 edge connector and metal mounting plate. The socketed memory/logic ICs are not present, making this a good candidate for restoration, parts, historical display, or an S-100 collection.Untested and sold as shown. Please review all photographs carefully for exact configuration and condition.A particularly interesting piece of 1976 S-100 / Altair-era computer hardware.