Forth
Programming language
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Forth is a procedural, concatenative, stack-oriented programming language and interactive integrated development environment designed by Charles H. "Chuck" Moore and first used by other programmers in 1970. Wikipedia
Designed by: Charles H. Moore
Filename extensions: .fs,.fth,.4th,.f,.forth
First appeared: 1970; 54 years ago
Paradigm: concatenative stack-based, procedural, reflective
Typing discipline: Typeless