Virtual Colossus @VirtualColossus
Colossus was a computer built during WW2 to crack the German Lorenz. 3D web based version + Enigma,Lorenz,Typex,Bombe & M-209 @[email protected] virtualcolossus.co.uk Milton Keynes, England Joined August 2016-
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15 Jun 1906: Birth of Gordon Welchman, #BPark codebreaker, inventor of Bombe diagonal board, visionary administrator. Head of Hut 6 1940-43.
15 Jun 1941: German navy change bigram tables for encoding Enigma message keys. #BPark start planning a "pinch" to get the new tables.
We’re excited to share that Bletchley Park has been awarded Silver in the Large Visitor Attraction of the Year category at the VisitEngland Awards for Excellence. This national recognition reflects the dedication of our staff and volunteers who work every day to bring the extraordinary story of Bletchley Park to life for visitors from around the world. Thank you to everyone who has visited and supported us. We’re honoured to be recognised among England’s leading visitor attractions and look forward to welcoming many more visitors to our historic site. #VisitEnglandAwards #VisitEngland #AwardsForExcellence #VisitorAttraction #Heritage #BletchleyPark
04 Jun 1944: US Navy capture German submarine U-505 off NW Africa, including its codebooks and Enigma machine.
02 Jun 1943: #BPark Hut 6 break into "Albatross", Enigma key of German 10th Army in Sicily, ahead of planned Allied invasion there in July.
Update for Virtual SG-41: the numeric-only SG-41z now available at sg41.virtualcolossus.co.uk. Used for sending weather reports where the details were encoded as a set of numbers. It's very similar to the SG-41 but with a few interesting omissions which I'll be documenting soon.
Love tech history? Help us keep the fans spinning and the valves glowing! Become a @tnmoc Supporter for just £55 a year. ✅ Exclusive events ✅ Unlimited museum entry ✅ Preserving the world's computing heritage Be part of history : tnmoc.org/become-a-suppo… #TechHistory #TNMoC
Breaking Enigma With An FPGA, Just Like At Bletchly Park via @hackaday - very cool to see the video of them demonstrating it using my Virtual Enigma at enigma.virtualcolossus.co.uk ! hackaday.com/2026/05/30/bre…
Another D-Day veteran leaves us. Sad news this afternoon that the SONT are reporting the passing of Alec Penstone. We Will Remember Them
I built Enigma: a 15-minute scrollytelling walkthrough that takes you from Caesar ciphers to actually operating an Enigma machine; and shows you the flaw that let Bletchley break it.
On this day in 1936, Alan Turing submitted his paper "On computable numbers, with an application to the Entscheidungsproblem" where he proposed a machine which could compute any effectively calculable function, the foundations of today's computing. turingarchive.kings.cam.ac.uk/publications-l…
24 May 1943: Signing of Travis-Strong ("BRUSA") agreement, establishing Anglo-American cooperative codebreaking and signals intelligence.
Happy 102nd birthday Hermione Wynn. bletchleypark.org.uk/roll-of-honour… bbc.co.uk/news/articles/…
Level up your May Half Term at @tnmoc with STEM Bytes 2026! Coding, robotics, VR/AR await. Book: eventbrite.com/e/may-half-ter… #STEM #BletchleyPark #MiltonKeynes #CodingForKids #HalfTerm
Hut 3 - Codebreaking Hut Then and now: Hut 3 before restoration in 2013, and today. The original building has been carefully restored to reflect its 1941 condition. Discover the stories of Hut 3 and more at Bletchley Park.
🚨 Call for Entries: The Tony Sale Award 2026! Recognising worldwide excellence in computer conservation. Hardware or software, we want to see your practical projects! 🏆 Awards Event: 29 Sept 2026 @ @tnmoc ⏰ Entry Deadline: 30 June 2026 Enter here: computerconservationsociety.org/sale-award/ind…
Work is progressing on the numeric only SG-41Z model of Virtual Schlüsselgerät 41 used for sending weather information. The print wheels were tricky but are done. Another difference is the SG-41Z only has 5 of the sensing arms (6 on SG-41) and 15 bars on the cage (25 on SG-41)
Love computing history? We’re looking for volunteers to help at our world-class collection! Join our community on Tuesdays, Thursdays, or weekends to support visitors and get hands-on with tech history. Half-day and full-day slots available. Interested? tnmoc.org/volunteer
One ticket, a whole year of discovery at Bletchley Park. Your visit doesn’t end when you leave. Your admission is a 12-month Annual Pass, giving you unlimited return visits for a whole year. Come for the history, learning, or a great day out and return whenever something new catches your interest. Book tickets here: ow.ly/RRw050YSpLU
On this Day! In 1941 The Zuse Z3 was completed by Konrad Zuse in Berlin. I's the world’s first working, program-controlled, and fully automatic digital computer. It was a Turing-complete machine and implemented essential components of modern computing . #ZuseZ3 #TuringComplete
Bletchley Park @bletchleypark
54K Followers 3K Following Once the top-secret Home of the Codebreakers. 📅 Open daily. ⬇️ Book tickets online!
Ken Shirriff @kenshirriff
70K Followers 1K Following No longer active on Twitter. Bsky: @righto.com; Mastodon: @[email protected]
TNMOC @tnmoc
10K Followers 3K Following The National Museum of Computing (TNMOC) is home to the world's largest collection of working historic computers. Follow the development of computing:
Dr Helen Fry | WWII H... @DrHelenFry
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Peter Onion @PeterOnion
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Dr Peter Caddick-Adam... @militaryhistori
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Dr Claire Hubbard-Hal... @thespyhistorian
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time to go @JohnKennedyEsq
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Computing History @computermuseum
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Brian @bgneal
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Ronald Meier - sport/... @rpmeier
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dalhaire @de_vallibus
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soulblocks @soulblocks
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slim baccar @Baccar_Slim
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-- @LawandAnwer
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Aspen Mayer @aspenmayer
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Paul @kabouterjong
202 Followers 1K Following (Eng.) gnomepuppy Gebroken ruggewervel. Vrijwilliger in verzorg/verpleeghuis (+2025 bibliotheek?). Love you people (& nature, earth, science, (retro)tech).
decentricity 🦔♀�... @decentricity
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Steve @veryAncientTank
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Daniel Takayama @danieltakayama
208 Followers 171 Following Family, hunting, nature, trailrunning, whisky, photography, geocaching (D/T), hamradio (SM0UDH) and more!
Amir Khan @m4amirkhan
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zaied @zaid148
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MDSSB @maarten_tilburg
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Jbh369 @jbh369
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Tim-san 🇬🇧❤�... @ukrockdrummer
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Bletchley Park @bletchleypark
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Ken Shirriff @kenshirriff
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TNMOC @tnmoc
10K Followers 3K Following The National Museum of Computing (TNMOC) is home to the world's largest collection of working historic computers. Follow the development of computing:
GCHQ @GCHQ
186K Followers 326 Following The UK's intelligence, security and cyber agency, helping to keep the UK safe online and in the real world. Follow the cyber security arm of our mission @NCSC.
Dr Helen Fry | WWII H... @DrHelenFry
74K Followers 2K Following Author & Historian of 25+ books on WWII, espionage & spies. Expert on Secret Listeners, Germans who fought for Britain, and Women in Intelligence Services.
Peter Onion @PeterOnion
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Dr Peter Caddick-Adam... @militaryhistori
89K Followers 90K Following Welcome to Planet Caddick: wordsmith & war professor; NATO historian; ex-reserve officer; 9 books; defence journalist @TheCriticMag/@BBC/@SkyNews
Dr Claire Hubbard-Hal... @thespyhistorian
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time to go @JohnKennedyEsq
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Computing History @computermuseum
31K Followers 1K Following The Centre for Computing History - The UK’s largest computer and video game museum with a uniquely hands-on exhibition.
National Cryptologic ... @NatCryptoMuseum
7K Followers 81 Following As @NSAGov's principal gateway to the public, the NCM collects, preserves, and showcases unique cryptologic treasures.
Retro & Homebrew Comp... @6502nerd
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Paul Reed @sommecourt
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Tony Comer @TCHisTree
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The National Archives @UkNatArchives
164K Followers 710 Following Official archive of the UK government. Discover our online collections, research guides and educational resources, spanning 1000 years of history.
Rory @MrRoryFlint
371 Followers 175 Following managing engineers by day. managed by 3 children by night. bullish on ai taking over both
Dr.Cool @Dr_Cool
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mrdoornbos @mrdoornbos
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Mike’s Old Tat 🇬... @stockotrader
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Ontario Heritage Trus... @ONheritage
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654 Followers 92 Following Creative Developer. Love threejs & procedural graphics
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Sophie Wiggins @sophwigginsITV
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Intuitive Machines @Int_Machines
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ACONIT @AconitGre
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129 Followers 332 Following Computer engineer & technologist | Radio (HF/SDR) | Cold War, Signals & military tech history | Wargamer (board/sims)
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68 Followers 156 Following Retro computer collector and enthusiasts based in Italy. I occasionally posts video of my collection on youtube: https://t.co/QK6iTYIJzN
SWWEC @SWWEC1
1K Followers 349 Following The Second World War Experience Centre is a UK charity collecting, conserving & making available the personal stories of those who lived through WWII
Association MO5 @assomo5
12K Followers 731 Following Association type loi 1901 dédiée à la préservation et la diffusion au public du patrimoine numérique.
Thomas Flynn @nebulousflynn
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Alex King @devopslime... @devoplimeyninja
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paul gannon @paulgannonbike
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Mark Simner @marksimner
5K Followers 2K Following Author and Magazine Feature Writer of British Military History | MHM Book of the Year Nominee | Book Reviewer | Militaria Collector | BA (Hons) MSc
Rebecca Foy @_RebeccaFoy
410 Followers 281 Following Director of Public Engagement @BletchleyPark, trustee @TullieHouse, loves painting, grammar, lighthouses, Brunel, Harry Potter... Views expressed are my own.
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Andy Taylor @taylorandy
430 Followers 547 Following Gone. Find me elsewhere. @andytaylor.bsky.social
Louise 6502 @louise65... @Louise_6502
54 Followers 7 Following Looks after the PC Gallery at the National Museum Of Computing. Commodore Geek. 🏳️⚧️ No longer active on here, gone over to the nicer place .
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5K Followers 2K Following Military Historian, best-selling author, Prof of History, Former Infantry Officer. Creator, Host, Writer, Producer etc. Creaky old Ballplayer.
Casillic @Casillic
15K Followers 4K Following Critical Infrastructure, High Consequence / High Integrity Systems, Space, Nuclear, Mathematics, Public Health, HPC #NASASocial RT|Fav|Follow≠Approve|No DM 🇺🇸
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Tilly Blyth @tillyblyth
2K Followers 2K Following Executive Director, Collections and Curatorial, IWM, Trustee @bletchleypark and Blue Plaques Panel for @englishheritage
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547 Followers 1K Following Researcher and Public Policy Analyst with experience as advisor to the local and central government institutions. Dr hab. in public administration.
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