Modula
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The Modula programming language is a descendent of the Pascal programming language, developed by the same Pascal designer Niklaus Wirth in Switzerland in the late 1970s. The main innovation of Modula over Pascal is a module system, used for grouping sets of related declarations into program units; hence the name Modula.
Modula was never released, and its development was discontinued after its publication; Wirth then concentrated his efforts on Modula's successor: Modula-2. Strictly speaking, Wirth never released Modula, but a compiler from The University of York, UK, was released.