Turbo Pascal is a software development system that includes a compiler and an Integrated Development Environment (IDE) for the Pascal programming language running under CP/M, CP/M-86, and MS-DOS, developed by Borland under Philippe Kahn's leadership. The name Borland Pascal was generally reserved for the high-end packages (with more libraries and standard library source code) while the original cheap and widely known version was sold as Turbo Pascal. The name Borland Pascal is also used more generically for Borland's dialect of Pascal.