Corsham Computer Centre (CCC) is an underground British Ministry of Defence (MoD) installation in Corsham, Wiltshire, built in the 1980s. According to the MoD, the centre "processes data in support of the Royal Navy". The centre has been similarly described by Des Browne in 2007, then Secretary of State for Defence, as a "data processing facility in support of Royal Navy operations". The facility was built in Hudswell Quarry, near Box Tunnel part of the broader complex of tunnels and quarries in the Corsham area and adjacent to the former Central Ammunition Depot built prior to World War II.