OOPS can be seeded with a wide variety of programming languages. For the experiments, we wrote an interpreter for a stack-based universal programming language inspired by FORTH . We provide initial instructions for defining and calling recursive functions, iterative loops, arithmetic operations, and domain-specific behavior. Optimal metasearching for better search algorithms is enabled through bias-shifting instructions that can modify the conditional probabilities of future search options in currently running self-delimiting programs. Sections A.1, explains the basic data structures; Sections A.2.1, A.2.2, A.2.3 define basic primitive instructions; Section A.3 shows how to compose complex programs from primitive ones, and explains how the user may insert them into total code .