- pascal, Pa - a unit of pressure equal to one newton per square meter
--1 is a kind of pressure unit
- Pascal, Blaise Pascal - French mathematician and philosopher and Jansenist; invented an adding machine; contributed (with Fermat) to the theory of probability (1623-1662)
--2 is a kind of mathematician; philosopher
- Pascal - a programing language designed to teach programming through a top-down modular approach
--3 is a kind of programming language, programing language