The godlike being who keeps your system running. Responsible for everything involving your system and the network it's on, including but not limited to managing your account (creation, modification, closure, deletion), your workstation, your subnet, your routers, the system-wide hosts table, the mail subsystem, all mail aliases and groups, keeping time synchronized across the network, the news subsystem, the printer subsystem, any applications you use--basically, the person who keeps everything working smoothly and seamlessly.