LorenzThe Lorenz SZ40 and SZ42 (Schlüsselzusatz, meaning "cipher attachment") machines were used for high-level communications by the German Army High Command.

The National Museum of Computing at Bletchley Park needs our donations to continue providing public access to Colossus and other exhibits. The Museum receives no government funding and relies on the generosity of people like you. Donations of £25 or more receive a limited edition t-shirt..


Current Situation at Bletchley Park
Bletchley Park has had a troubled time over the last few years. Due to the Official Secrets Act, little was known of the importance of the work carried at here during the war, allowing the site to fall into a state of neglect, leaving it vulnerable to property developers.

Bletchley Park Trust was formed on 13th February 1992, three days after Milton Keynes Borough Council declared most of the Park a conservation area. Negotiations began with the site's landowners.

This group first opened the site to visitors in 1993 and, with the help of many volunteers and enthusiasts maintained a collection of independent and Trust exhibitions for the general public to enjoy. HRH The Duke of Kent became Chief Patron, officially opening the Museum in July 1994.

In 2005 two charities, the Bletchley Park Trust (BPT) and the Codes and Ciphers Heritage Trust (CCHT), took the decision to collaborate on a new initiative – The National Museum of Computing at Bletchley Park, with the intention of founding a world class permanent exhibition on the history of computing at Bletchley Park.

The museum houses the Colossus computer rebuild project, in its original location at Block H, and features an exhibition of the most complex code cracking activities located at the Park. The intention of this project is to create an accredited world-class museum showing the development of computing from pioneering wartime efforts to the present day.

The museum will cover 3 main areas:
  • The development of the world's first programmable electronic computer, Colossus, and the influence the machine had on subsequent computer development throughout the world.
  • The development of computing to the present day, working in close collaboration with The National Museums of Science and Industry in London and Manchester.
  • Computer Security - an archive and presentation of early secure systems including cryptography, internet security, firewalls and virus protection. This will provide an opportunity to understand how war-time developments in encryption have moved into the Internet age.
In order to achieve this vision the National Museum of Computing needs our help. It receives no government assistance so all donations are invaluable in establishing a world class location for future generations.
   

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