Bletchley Park museum

SOE, Special Operations Executive, by Bernie Harris.

Camp X

The Navajo Code Talkers

N.K.V.D. & K.G.B. Home Page

Tunnel and Shelter researching

Deadly Knowledge

National Cryptologic Museum

Enigma Cipher Machine

The Alan Turing Internet Scrapbook

Decoding Nazi Secrets

Codebreaking and Secret Weapons in World War II