O Sark parece ser um programa personalizado, projetado especificamente para auxiliar e apoiar o MCP na rede. É persistentemente referido, na novela oficial do filme, como "o Programa de Comando".
That moment seemed near. The User-Believer shifted uneasily as he waited. He was determined to do his best; that was as it should be with a program. But his adversary was Sark, the Command Program.
Sark the Red, the unbeaten; Sark the tall, merciless Warrior, had won so consistently that he no longer kept track of his victories. It was Sark who served as Lord of the System, under the rulership of the Master Control Program. Sark’s mission, the Master Control Program’s prime objective, was to wipe out all loyalty to the Users.