Terry A. Davis

Terrence Andrew Davis was an American electrical engineer, computer programmer, and outsider artist best known for creating and designing TempleOS, a public domain operating system, written in a programming language developed by Davis called HolyC. He believed God had commanded him to create TempleOS as the Third Temple prophesied in the Bible. In 1996, Davis began experiencing regular manic episodes, some of which led to hospitalization. Initially diagnosed with bipolar disorder, he was later declared to have schizophrenia. Eight months before his death, he struggled with periods of homelessness. His fans brought him supplies, but Davis refused their offers of housing. In August 2018, he was struck by a train and died at the age of 48.