The Royal Arsenal Co-operative Society (RACS) was a large consumer co-operative based in south east London, England. The co-operative took its name from the Royal Arsenal munitions works in Woolwich and its motto was: "Each for all and all for each". In 1985 it merged into the national Co-operative Wholesale Society.

The Royal Arsenal, Woolwich is an establishment on the south bank of the River Thames in Woolwich in south-east London, England, that was used for the manufacture of armaments and ammunition, proofing, and explosives research for the British armed forces. It was originally known as the Woolwich Warren, having begun on land previously used as a domestic warren in the grounds of a mid-16th century Tudor house, Tower Place. Much of the initial history of the site is linked with that of the Office of Ordnance, which purchased the Warren in the late 17th century in order to expand an earlier base at Gun Wharf in Woolwich Dockyard.