Hi Joris: I was shown the photographs, and given permission to interview the developers, in mid-1975. A set of photographs, and a single-page description, were released to the Public Record Office in 1975. My (cleared) paper revealing the Colossus was given at the splendid Los Alamos conference in June 1976 – see https://computerhistory.org/blog/computings-woodstock/. (I had previously, in 1972, published such few facts as I could discover about the project in my 1972 paper “On Alan Turing and the Origins of Computers” - http://homepages.cs.ncl.ac.uk/brian.randell/Papers-Books/126.pdf.) Cheers Brian Randell — School of Computing, Newcastle University, 1 Science Square, Newcastle upon Tyne, NE4 5TG EMAIL = Brian.Randell@ncl.ac.uk PHONE = +44 191 208 7923 URL = https://www.ncl.ac.uk/computing/staff/profile/brianrandell.html On 18/01/2024, 13:42, "Joris van Zundert" <joris.van.zundert@huygens.knaw.nl> wrote: Hi, Any ideas on this puzzling sentence in the press release? “The Colossus computer was created during the Second World War […] but its existence was only revealed in the early 2000s after six decades of secrecy.” As far as I know the existence of Colossus has in no way been a mystery at least since the early 1970s, right? Best --Joris From: Members <members-bounces@lists.sigcis.org<mailto:members-bounces@lists.sigcis.org>> on behalf of Brian Randell via Members <members@lists.sigcis.org<mailto:members@lists.sigcis.org>> Date: Thursday, January 18, 2024 at 12:50 To: Sigcis <members@sigcis.org<mailto:members@sigcis.org>> Subject: [SIGCIS-Members] Colossus at 80 Hi: Here is the official GCHQ press release: https://www.gchq.gov.uk/news/colossus-80 <https://www.gchq.gov.uk/news/colossus-80><https://www.gchq.gov.uk/news/colossus-80%3e> Cheers Brian Randell — School of Computing, Newcastle University, 1 Science Square, Newcastle upon Tyne, NE4 5TG EMAIL = Brian.Randell@ncl.ac.uk<mailto:Brian.Randell@ncl.ac.uk> PHONE = +44 191 208 7923 URL = https://www.ncl.ac.uk/computing/staff/profile/brianrandell.html