In 1967, BCPL language was developed by Martin Richards. The BCPL Language was used to write operating system and compilers. After two years, Ken Thomson developed B programming language programming language had advanced features as compared with BCPL. The UNIX operating system was first developed in B in 1970at Bell Laboratory. Both BCPL and B were "type-less" language. Thus each data item in these languages occupied one "word" in the memory.
In 1972, Dennis Ritche developed C language at Bell laboratory. The C language was advanced version of B language. It had many important concepts of BCPL and B languages. New features like data typing and many other functions were also included in c language. The nest version of UNIX is revised and written in C. c language was developed as computer independent language. A program written in C can be run on any computer.
In 1980, C++ was developed by Bjarne Stroustrup. It was an extension of C. It was designed for UNIX system environment. C++ enabled programmer to improve quality of code. It included object oriented programming.
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