A general-purpose programming language and IDE, ABC is an alternative to BASIC, Pascal, or AWK, developed for teaching and prototyping. ABC was highly influential in Python’s design. 

ABC is an imperative general-purpose programming language and integrated development environment (IDE) developed at Centrum Wiskunde & Informatica (CWI), Netherlands by Leo Geurts, Lambert Meertens, and Steven Pemberton. It is interactive, structured, high-level, and intended to be used instead of BASIC, Pascal, or AWK. It is intended for teaching or prototyping, but not as a systems-programming language.