Simpler postal codes mimic zip codes for fast machine reading.

FORBES: Scanned Goods

Bletchley Park was the wartime home of the Government Code and Cypher School which broke the codes generated by the German Enigma machine, using the Bombe.

BBC: Bletchley Park Enigma code hut to be restored

It was really about searching your machine logs, and learning where all your error codes are.

FORBES: Splunk CEO Godfrey Sullivan's Plans for Breaking Into Business Computing

Here are secrets and codes, an elaborate cipher-breaking machine, an obsession with graves and crazy adventures to find lost manuscripts.

ECONOMIST: The man and his pen