ABC: A Surprisingly Powerful and Easy-to-Learn Programming Language

ABC is an interactive programming language designed as a user-friendly replacement for BASIC. Born from a task analysis of programming, it's surprisingly easy to learn (an hour or so for experienced programmers) yet powerful enough for experts. It boasts a concise set of five data types, strong typing without declarations, and no limitations besides memory exhaustion. Its environment is equally impressive, eliminating file management hassles and offering a consistent interface with undo functionality. ABC programs are often one-fourth to one-fifth the size of equivalent Pascal or C programs. The ABC Programmer's Handbook offers comprehensive documentation.