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Modula Programming Language Family
The Modula programming language is a descendant of the Pascal (programming language), Pascal language. It was developed in Switzerland, at ETH Zurich, in the mid-1970s by Niklaus Wirth, the same person who designed Pascal. The main innovation of Modula over Pascal is a Modular programming, module system, used for grouping sets of related declarations into program units; hence the name ''Modula''. The language is defined in a report by Wirth called ''Modula. A language for modular multiprogramming'' published 1976. Modula was first implemented by Wirth on a PDP-11. Very soon, other implementations followed, most importantly, the compilers developed for University of York Modula, and one at Philips Laboratories named PL Modula, which generated code for the LSI-11 microprocessor. The development of Modula was discontinued soon after its publication. Wirth then concentrated his efforts on Modula's successor, Modula-2. See also * Modula-2 * Modula-2+ * Modula-3 References

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Imperative Programming
In computer science, imperative programming is a programming paradigm of software that uses Statement (computer science), statements that change a program's state (computer science), state. In much the same way that the imperative mood in natural languages expresses commands, an imperative program consists of command (computing), commands for the computer to perform. Imperative programming focuses on describing ''how'' a program operates step by step (with general order of the steps being determined in source code by the placement of statements one below the other), rather than on high-level descriptions of its expected results. The term is often used in contrast to declarative programming, which focuses on ''what'' the program should accomplish without specifying all the details of ''how'' the program should achieve the result. Procedural programming Procedural programming is a type of imperative programming in which the program is built from one or more procedures (also termed s ...
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