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For other languages named Headache, see Headache.
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HA is an esoteric programming language created by Peter Larsen in 2011. HA is short for: Headache, but as apparently headache was already taken as a name for a programming language I renamed it to the the shorter version HA.

HA is best described as an extended Befunge-like programming language, with alot of functionality added. The goal is to extend the concept with as many unique features as possible. For example you can set data/code on the 2D-tapes "in motion", you can run RegEx match/search/replace on code and data, you can have several IP's running in parallel in a kind of multithreaded way.

I will here try to describe all of the 500+ commands available (I am currently in the process of adding functionality)