Pascal was developed in the early 1970's by Niklaus Wirth. Pascal did not introduce many new programming features, but instead combined what Wirth considered to be the best parts of previous languages. It was designed primarily as a teaching language, and that is the area where it is most widely used. Because Wirth believed languages should be simple, Pascal does not support many features, such as separate compilation, that many programmers consider essential. Despite this, Pascal has been quite popular at times, probably because it is easy to learn, simple yet powerful, and quite safe when compared with most other languages.

Source: "Concepts of Programming Languages" by Robert W. Sebesta, The Benjamin/Cummings Publishing Company, Inc, 1993