PORS
Template:Orphan Plus-One-Recall-Store (PORS) is a language used in evolutionary computation and genetic programming.<ref>8.2 The PORS Language, Page 215, Evolutionary Computation for Modeling And Optimization - Daniel Ashlock - Google Books</ref>
The PORS language consists of two terminal nodes (1 and recall), one unary operation (store), and one binary operation (plus) that be used in a parse tree to do a calculation.