The National Museum of Computing located on Bletchley Park is an independent charity housing the largest collection of functional historic computers in Europe, including a rebuilt Colossus, the world’s first electronic programmable computer and the WITCH, the world's oldest working digital computer.
Anyone can become an individual member. See http://www.tnmoc.org/support/become-member Corporate sponsors are always welcome: See http://www.tnmoc.org/support/become-sponsor
For more information, see www.tnmoc.org and follow @tnmoc on Twitter.