Monad was an intelligent satellite that Mike and the Bots encountered during one of the host segments in episode 706, Laserblast. Monad showed up on the SOL's bridge and threatened to destroy Mike and the 'Bots for being "imperfections", but completely failed to intimidate them. Eventually their taunts drove him to tears and Mike flushed the whining satellite out of the airlock.
This segment was a direct parody of the "Star Trek" episode The Changeling, which featured a satellite called Nomad in a similar role.
- Nomad article at Memory Alpha, the Star Trek Wiki