[Terry Davis] was an exceptional programmer who created his own programming language, dedicated compiler, boot loader, operating system kernel [TempleOS] written in language he created, various graphical libraries without relying on external dependencies and borrowing. Flight simulator game is one more addition to his achievements. Society considered him to be mentally ill schizophrenic. According to him, God told him to create operating system in 640x480 resolution in 16 colors. Estimated IQ was around 150.