Platform One
Platform One was a Observation space station designed as an observation deck for various events. In 5,000,000,000 it was orbiting Earth and some of the richest and most powerful people in the Universe where Humans existed gathered there to witness the destruction of Earth. It was moved between different artistic events. It was an alpha class space station, meaning it was 'top of the range'. The space station was controlled by a computer (Mega mind), who in turn was controlled by The Corporation.
Platform One was capable of having docked several shuttles, and used Sun filters to shield from the heat of the sun. The use of weapons, teleportation or religion was forbidden on the platform under the Peace treaty 5.4/cup/16.
It was staffed by Steward, the host, and a large group of maintenance staff. The Platform also had plumbers to look after the air ducts including Raffalo. The shafts also carried hot water and depending on the area of the blockage a suite could left without hot water.
It also had a suite called the Manchester Suite.
The Doctor took Rose Tyler there on her first trip in TARDIS. (DW: The End of the World)
