The Packard Bell 250 was the first machine in the collection. It is a 22-bit serial machine with an acoustic delay line memory. It was built around 1961 and predates true minicomputers, since it was rather slow and at $50,000 for a typical system it was too expensive. The basic I/O device was a Friden Flexowriter. This picture shows the PB250 housed in the same rack as its power supply (bottom) and a model 8001 Data General Supernova (middle).