TempleOS
TempleOS is a biblical operating system (OS). It was designed to be the Third Temple prophesied in the Bible. It was created by American programmer Terry A. Davis. TempleOS was written during Terry Davis's manic episodes. He described his inspiration as a revelation from God. The features of TempleOS include a 640x480 resolution, 16-color display, and single-voice audio. Terry Davis said that these features were designed according to instructions from God. It uses a programming language called HolyC. It includes a flight simulator, compiler, and kernel.