TempleOS (formerly J Operating System, SparrowOS and LoseThos) is a biblical-themed lightweight operating system designed to be the Third Temple prophesied in the Bible. It was created by American programmer Terry A. Davis, who developed it alone over the course of a decade after a series of episodes that he later described as a revelation from God.
The system was characterized as a modern x86-64 Commodore 64, using an interface similar to a mixture of DOS and Turbo C. Davis proclaimed that the system's features, such as its 640x480 resolution, 16-color display and single audio voice, were explicitly instructed to him by God.[1] It was programmed with an original variation of C (named HolyC) in place of BASIC, and included an original flight simulator, compiler and kernel.
TempleOS was released in 2013 and last updated in 2017. It was received with largely favorable reviews in tech communities and Davis amassed a small online following. He died on August 11, 2018.[2]
