ETA

ETA is an esoteric programming language designed by Mike Taylor in 1999. The name comes from its instruction set, based on the eight most common letters in the English language: E, T, A, O, I, N, S, H. "Eta" is also the seventh letter in the Greek alphabet, and ETA uses base-7 numbering. The language is stack-based and all characters that are not instructions are treated as comments.

External resources

 * The ETA Project