In November 1983 Borland International released Turbo Pascal, an integrated Pascal compiler and editor for the small computers of the day. The Turbo Pascal Reference Manual identifies the publisher as “Borland International” and describes a single product that combined a “built-in editor,” a compiler, and a run environment with “compilation and execution times second to none,” running on “CP/M-80, CP/M-86, and MS-DOS/PC-DOS.” Many later accounts give the exact launch as November 20, 1983; the firsthand product sources confirm the year and month but not the precise day, so the day is reported here with caution.
The milestone matters because of what it changed about access. Before Turbo Pascal, a serious compiler was typically slow, awkward, and expensive. Turbo Pascal compiled in memory, started instantly, and cost a small fraction of competing tools, putting a professional-grade development environment within reach of students and hobbyists.
Niklaus Wirth, the designer of Pascal, marks this same moment in his own history of software engineering. Writing about the arrival of the microcomputer, he recalls that universities had distributed a cheap portable Pascal compiler and that “so did the Borland company with its version of compiler. This was at a time when other compilers were expensive software, and it was nothing less than a turning-point in commercializing software. Suddenly, there was a mass market. Computing went public.”
Turbo Pascal launched Borland as a company, popularized the integrated development environment, and turned Pascal from a university teaching language into a tool used by a generation of practical programmers.