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Veterans see Lorenz encrypt to decrypt

For the first time ever, all the equipment used in making and breaking Lorenz, Hitler’s most secret cipher, was demonstrated with re-enactors to an audience including Colossus Wrens on 3 June 2016.

Computer hacking archive at TNMOC

The archive of a hacking case that made computing legal history in the UK and changed all our lives has been deposited at TNMOC by Robert Schifreen, the ‘white hat’ at the centre of the 1980’s controversy

Isosceles Finance: new Foundation Sponsor

Isosceles Finance, providers of strategic and operational finance, accounting and HR services to fast-growing technology businesses, has become a Bronze Foundation sponsor of TNMOC.

Events Subscribe to Upcoming events

Upcoming lectures - Breaking Enigma, behind the scenes

Talks at TNMOC over the next few months: Paul Kellar on Breaking Enigma - Behind the Scenes with a demonstration of Gunther to Churchill; and An Evening with Colossus (and Lorenz) with Phil Hayes. Tickets now available.

Join a Week of Code 2016

It’s back! The week-long coding event for keen young programmers and developers returns to TNMOC on Bletchley Park this year. It's for young coders aged 12-17 eager to spend a whole week coding with others! From 1-5 August 2016, daily 10am to 5pm.

Vintage Games Weekend - EXTENDED TO MONDAY

Fun for all the family at the TNMOC Vintage Games Weekend EXTENDED to Monday! Come along for a bit of nostalgia, a new retro experience or for the competition: Atari, Pong, Commidore Amiga, Spectrums and the original DOOM!

Current Projects Subscribe to Current projects

Searching for Lost Systems

The BCL Molecular Computer was first introduced in 1971 and was sold and used in various forms until the 1990s. But does one still exist today? Who can claim to be the last user?

Computer memory EDSAC style - delay lines

Peter Linnington discusses the options for today's reconstruction of EDSAC. Mercury or something else? The reconstruction of the first computer to provide a university computing service moves forward.

Commissioning EDSAC

Technical discussions of the latest stages in commissioning the reconstruction of EDSAC, the 1949 scientific computer, that is gradually being brought to life in the First Generation Gallery at TNMOC.

Notes from the Museum Subscribe to Notes from the Museum

We won't Flog It!

Paul Martin of Flog It visited TNMOC to feature Lorenz and Colossus and the two very under-rated heroes Bill Tutte and Tommy Flowers. An incredible story becoming more impressive as years pass!

Volunteers' Week: Peter Vaughan

At front of house and behind the scenes, TNMOC relies on volunteers. Peter Vaughan (pictured right) is one of those volunteers whose work is invaluable and his efforts have been recognised in Volunteers' Week.

Coverage of Wrens witnessing Lorenz from encrypt to decrypt

For the first time ever, all the equipment used in making and breaking Lorenz, Hitler’s most secret cipher, was demonstrated and re-enacted to Colossus Wrens at TNMOC on 3 June 2016.

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