Microsoft Pascal
Microsoft Pascal Compiler for the 286 XENIX Operating System User's Guide, part number 8511I-330-05, document number 020-092-013, from 1985.
Original author(s)	Microsoft Corporation
Initial release	1980; 45 years ago (1980)[1][2]
Stable release	4.0 / 1988; 37 years ago (1988)[3][4]
Operating system	MS-DOS,Xenix,OS/2
Type	Pascal programming language
License	Commercial

Microsoft Pascal is a discontinued implementation of thePascal programming language developed by theMicrosoft Corporation forcompiling programs for running on itsMS-DOS andXenix^[5] operating systems and, in later versions, onOS/2 (like many other Microsoft programming tools, albeit they are only capable of generating 16-bit programs for the latter).

Microsoft Pascal version 1.0 was released in 1980.^[1] The last version of Microsoft Pascal to be released was version 4.0 in 1988,^[1] when Microsoft Pascal was superseded byMicrosoft QuickPascal, a cheaper development tool that Microsoft produced in order to compete withBorland'sTurbo Pascal.

Microsoft Pascal was priced at$300,^[4] whereas QuickPascal was priced between$25 and 50, and the differences between the two were similar to those betweenMicrosoft BASIC Professional Development System and MicrosoftQuickBASIC.^[6]

Unlike the ISO-compliant Microsoft Pascal product, QuickPascal went after the ultimate compatibility with Turbo Pascal. This included not only source-level compatibility, but rather complete binary compatibility with widely available unit libraries for the competitor's compiler. To achieve this level of compatibility, QuickPascal moved away from the common file format (OBJ) and tool set (LINK, LIB) shared by Microsoft's other compilers.

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