The Fairchild F8 microcomputer was made available in late1975 to electronic design engineers. The board has three large scale integration devices packaged in 40-pin ICs: CPU, PSU, and SMI. This circuit board performed as a 64K 8-bit personal computer which interfaced to a Teletype. The design permitted additional interfaces to floppy disk and other devices. A program called Fairbug, which resided in a 1 K ROM, allowed users to view and change memory and registers, and test programs written in the machine code. This device appeared at the beginning of the transition from time shared computers to personal computers.