Mother Computer

Buried deep underground in a ruined city on the planet Gaea—future Earth—is the Mother Computer (マザーコンピュータ Mazā Konpyūta), a towering monolith which stands testament to all the accomplishments of its mysterious creators... and all of their folly.

Despite millennia of disuse, it still functions... unfortunately.

Beast Wars II cartoon
Galvatron followed traces of Angolmois energy and discovered the Mother Computer. He directly interfaced with it and demanded it show him the most powerful forms in the planet's history; it imprinted the templates for a drill tank and a massive dragon onto him, but the strain put Galvatron into a deep slumber. Megastorm, using a more standard computer interface, requested specifications for weapons and construction vehicles suited to Gaea for the other Predacons to use. Starscream and BB captured Lio Convoy and brought him to the Mother Computer site, but he escaped and chased the Predacons off.

Much later, as the artificial planet Nemesis passed by Mars, a control robot emerged from Mars and headed for Gaea. It contacted the Maximals and NAVI in order to make them take it to the Mother Computer. Once there, it entered the computer and activated a doomsday program designed to crash the Moon into planet Gaea and eliminate the contaminated Angolmois energy before it would be able to threaten the universe.

With the help of Galvatron, the Maximals were able to break through the Mother Computer's defenses, allowing NAVI to enter the computer herself and reprogram it to deactivate the doomsday program. The Moon's descent was halted just in time.

Beast Wars: Uprising
When the Commandron ship Hyperborea entered orbit of the planet Energoa, the Skriix contacted them to say the planet and the Mother Computer belonged to them. Its ruins were close enough to the crash site of the Hyperborea for Astral Knight to spot it.