Celebrate NSIST's 2nd birthday

To help those interested in Second World War UK cryptology who wonder about the difference between an indicator and a discriminant, what forty-weepy might be, or what bonking and blogging meant at that time, Tony Comer has compiled from original sources a glossary. It’s available at https://www.nsist.org/glossary and, as part of NSIST’s educational remit, is completely free to access and use. It is the start of what we hope will develop into an online reference library. Pleas

Our NSIST volunteers have delivered the first two history volumes which are available now via our website . A History of the R/T 'Y' Organisation Ashore and Afloat July 1940 to May 1945 and The GC&CS Army and Airforce Sigint Volume XII