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Programming Language One (PL/I) is a procedural programming language treated by IBM. PL/I is simple enough that beginner developers can learn its English-like syntax quickly.
Early computer programming languages were more specialized. For example, business application developers formerly had to learn COMTRAN and COBOL while scientific application developers had to learn FORTRAN. This specialization led to an increasing need for a more general purpose language - one that could serve applications having different purposes.