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PL/1 Programming language

PL/1 Programming language is a third generation programming language. The first name of the PL/1 Programming language was New Programming Language NPL and then it was changed to PL/1 because it confuses with the National Physical Laboratoryin England. PL/1 Programming language was develop as a alternative to the assembler languages e.g COBOL, FORTRAN. Pl/1 programming language is extensible, for new hardware and new application areas. It is machine-independent and operate effectively across the main hardware and operating system ranges.

The features support by PL/1

Recursion
Structured programming
Linked data structure handling
Fixed-point
Floating-point
Complex
Character string handling
Bit string handling

Features of PL/1

no reserved keywords
defines it's data types without regard for any hardware
block-oriented language, consisting of packages, begin blocks, and statement
contains control structures
supports arrays, structures, unions, arrays of structures or unions, structures or unions of arrays, and combinations thereof
four different storage classes: AUTOMATIC, STATIC, CONTROLLED, and BASED