The third volume of a series on a glossary of codebreaking, WW2 Codebreaking Systems and Equipment, brings to the reader an easily understandable account and listing, of those methods, systems, and equipment collecting and analysing military intelligence principally during the second world war and beyond. A listing is provided which outlines the development of codebreaking and gathering of enemy intelligence. Whilst Bletchley Park was the HQ of codebreaking activities in wartime, numerous organisations became involved in a support role, and this became critical when more advanced enemy encoding machines were introduced by the Nazis. The evolution of certain organisations over time, can be tracked to a degree, by reading the glossary in depth. The text outlines the systems, equipment, and deception relevant to intelligence and codebreaking in some detail, which also complements the first two volumes in the series. The author has taken time to ensure the reader can more easily understand how the various systems and equipment used during WW2 enabled the gathering of military and other intelligence, and was used to apply codebreaking of enemy messages. Also, in some cases, the use of specialist deception techniques to attempt to fool the enemy.