Entropy is a programming language about giving up control. All data decays as the program runs: each value alters slightly every time it’s used, becoming less precise. An Entropy programmer needs to abandon the pursuit of precision which most programming demands—often working against years of habit—in order to program effectively. Any output from an Entropy program will be approximate, and the more the data is accessed, the more random it will become. The programmer has, at best, a short window to get his/her idea across before the program corrodes. The program itself is not altered—so the next time it runs, it is restored to its original condition, only to decay again through its next run.
Read more: http://esolangs.org/wiki/Entropy