William "Bill" D. Atkinson is an American computer engineer and photographer. Atkinson worked at Apple Computer from 1978 to 1990.

Lisa is a desktop computer developed by Apple, released on January 19, 1983. It is generally considered the first mass-market personal computer operable through a graphical user interface (GUI). In 1983, a machine like the Lisa was still so expensive that it was primarily marketed to individual and small and medium-sized businesses as a groundbreaking new alternative to much bigger and more expensive mainframes or minicomputers such as from IBM, that either require additional, expensive consultancy from the supplier, hiring specially trained personnel, or at least, a much steeper learning curve to maintain and operate. Earlier GUI-controlled personal computers were not mass-marketed; for example, the Xerox Alto was manufactured only for Xerox and select partners through Xerox PARC from the early to mid-1970s.