Virtual Colossus

#VirtualEnigma is coming to a browser near you to celebrate Alan Turing's Birthday! That means you've only got to wait until 23rd June 2021. It is fully browser based so no install required & should run on most modern systems. From WW2 to WWW @tnmoc @bletchleypark @threejs_org

Forgotten Polish codebreakers who helped crack Enigma uncovered tvpworld.com/94522199/bletc…

🎙️ New Podcast (E193) - Focus On: Asa Briggs Discover the story of Lord Asa Briggs, one of Britain's most influential historians, whose time at Bletchley Park between 1943 and 1945 offers a fascinating insight into life inside the wartime codebreaking operation. Featuring Bletchley Park historian Dr Thomas Cheetham, biographer Adam Sisman, and a rare interview with Lord Briggs himself. Available on Apple Podcasts, Spotify, and all major platforms. Listen here: ow.ly/GtFb50ZsjZK

Highlights from Day 1 of our first Polish Codebreaking Festival ✨ From inspiring talks and hands-on workshops to live demonstrations and family-friendly activities, the day was filled with opportunities to discover the remarkable story of the Polish Codebreakers. Will we be seeing you tomorrow? Book online today to save 10% on tickets, or purchase your tickets on the door. Annual Pass holders can use their existing passes and residents living within 10 miles of Bletchley Park can enjoy 50% off admission. @PolishEmbassyUK @PLInst_London

Celebrating 65 years of Sinclair's legacy! From the first slimline calculator to UK tech innovation. What was your first Sinclair device? Let’s celebrate the man who shrank the world of electronics! #SirCliveSinclair #SinclairRadionics #TechHistory #OnThisDay #BritishTech

Polish Memorial. This is one of three identical memorials by Maciej Szankowski commemorating the trailblazing efforts of the Polish Codebreakers, whose work was vital in Britain’s own codebreaking successes against the German military cipher, Enigma. The left hand side reads: 'This plaque commemorates the work of Marian Rejewski, Jerzy Rozycki and Henryk Zygalski, mathematicians of the Polish intelligence service, in first breaking the Enigma code. Their work greatly assisted the Bletchley Park code breakers and contributed to the Allied victory in World War II.' The right hand side - same text in Polish. Did you know there are also two other places commemorating the Polish mathematicians, one in Piłsudski Square in Warsaw and the other in the entrance hall of the @PolishEmbassyUK? Celebrate the pioneers of codebreaking at the Polish Codebreaking Festival, 25-26 July at Bletchley Park. Book tickets: ow.ly/i0wz50ZmlYN @PLInst_London

Polish Codebreakers. The Poles didn't just work out how Enigma operated, they broke it. Three outstanding mathematicians on the course - Marian Rejewski, Henryk Zygalski and Jerzy Różycki - proved key. Their knowledge gave the Bletchley Park Codebreakers a crucial head start on breaking Enigma. In July 1939, under increasing threat of a German invasion, the Poles shared their progress on Enigma with the British and the French at a conference in Pyry forest, near Warsaw. Celebrate the pioneers of codebreaking at the Polish Codebreaking Festival, 25-26 July at Bletchley Park. Book tickets: ow.ly/i0wz50ZmlYN @PolishEmbassyUK @PLInst_London less

Mair Russell Jones, brilliant Welsh linguist at Bletchley Park, helped crack German Enigma messages for four gruelling years. “I’d done nothing but thought about German codes, while I worked, while I ate, while I slept.” One of the unsung heroines of wartime intelligence:

Excuse the rough temporary visuals, but now the ASR33 is capable of punching and re-reading tapes. This is a big step since now it's trivial to let user upload/save their own tapes and fully play around with the pdp8's main mass storage system. The core is almost done!

ON THIS DAY in 1969, Apollo 11 launched and landed on the Moon using Raytheon's Apollo Guidance Computer, designed by MIT. Where did you watch the launch? #Apollo11 #MoonLanding #NASA #OnThisDay

Very important and fascinating news. Bletchley Park has been promoting knowledge about the Polish cryptologists and Polish–British cooperation for many years. Well done! 🇵🇱🇬🇧

Today I worked on improving the ASR33 experience, next to work on the puncher and on the loading/unloading paper tapes that you can pick up and upload/download. Plus enjoy the first snippets of sound design that I tried. (Any feedback more than welcome)

Exciting news from our friends at Open Source Hardware Group! #OSHCamp2026 is coming to Hebden Bridge on Aug 29-30! 🛠️ Sat: Packed programme of talks & presentations Sun: Hands-on workshops & a swap table! Check out the full lineup & grab your spot: oshug.org/event/oshcamp2…

Colossus has been recognised with IEEE Milestone. This is amazing news @tnmoc!

Join us on 25–26 July for the Polish Codebreaking Festival at Bletchley Park. Discover the vital role of Polish codebreakers in cracking the Enigma cipher, and explore their extraordinary legacy through a weekend of talks, workshops, live demonstrations, music, and family-friendly activities. This event is in partnership with the Polish Cultural Institute, the Embassy of the Republic of Poland in London and the Enigma Cipher Centre in Poznań. Find out more and book tickets: ow.ly/fx5X50ZfPKg @PolishEmbassyUK @PLInst_London

And finally a screenshot of my pdp8 emulator running a kaleidoscope program interfaced with a Type 30N display, usually paired with a PDP-1 and the display were spacewars was first created

I really, really love this PDP-8 simulation in progress by @RetroNewbieYT. Great work on the models (esp. the Teletype model 33 ASR), just take a look at the punch tape which you can even see through the holes .. great attention to detail. Will keep watch on progress. @tnmoc

How do Turing's 1936 ideas connect to smartphones? 📱 Find out at TNMOC/@LondonMath Soc Conf! Proud to feature Prof Julia Knight on computable structure theory. 📅 16–18 Sept 2026 📍 Bletchley Park Part of #Computable90. Get your pass! 🎟️👇 eventbrite.co.uk/e/1837259555789

July 1939: Polish intelligence shared its groundbreaking Enigma discoveries with British and French codebreakers. Their pioneering work gave the Allies a vital head start in breaking German enciphered communications and helped pave the way for Bletchley Park’s wartime successes. Did you know that the foundations of Bletchley Park’s Enigma story were laid in Poland?

01 Jul 1943: Naval Enigma M4 Rotor Gamma and Thin Reflector C come into use on the German U-boat "Triton" network. #BPark

“I wanted to do more for the war effort than baking sausage rolls.” - Bletchley Park Codebreaker Betty Webb MBE. (1923 - 2025)