The Colossus Rises Again.
Created | Updated Mar 7, 2009
The Guide has an entry on "Early Electronic Computers" (A951860) which describes Colossus, the world's first world's first electronic computer (sorry, Mr. Yankee Doodle, the Limeys got there before ENIAC)- which computer guru and author Tony Sale describes as a "large-scale electronic digital calculator.
Tony Sale was also responsible for jump-starting the Colossus Rebuild project.
Colossus was used in the last War to break the German's Lorenz
cipher This encrypted by adding by a special modulo-2 method a character (ideally randomly) to each character of the message. The code was decrypted by the same modulo02 addition.
For the boffins amongst us modulo-2 apparently operates in precise the same way as XOR in logic calculations.
A + C(added) = F F + C = A
