XERXES 8933A/A: The operating system responsible for the primary data loop onboard the Von Braun. XERXES allocated the billions of onboard subtasks, delegating them to hundreds of thousands of individual systems. However, the computing power aboard the Von Braun is not completely under XERXES' control. Clever hackers can bypass the XERXES system and gain temporary control of certain critical sub-systems. This was implemented as a safety feature (on the recommendation of Dr. Polito) and is intended to prevent a repeat of the SHODAN disaster of 2072.