"TRS 80 PC-1". old-computers.com. Retrieved 2015-03-05. Nowadays, it is often referred to as the TRS-80 PC-1, so as to differentiate it from its successor, the TRS-80 PC-2 (and following)
proquest.com
Hayes, Frank (December 16, 2002). "The Story So Far". Computerworld. 36 (51). IDG Publications: 28 – via the Internet Archive.
