TempleOS
TempleOS is 64-bit. It is in the public domain and is open source, which means anyone can use and modify the code. It gives users direct access to the lower-levels of the operating system, which means that users can easily change core components of the computer. TempleOS has a graphics library with 16 colors. It can be used with a keyboard and mouse. It has its own system for files. Terry Davis said the limited resolution was to make it easier for children to draw illustrations for God.