## Modula/R

Modula with relational database constructs added. LIDAS Group (J. Koch, M. Mall, P. Putfarken, M. Reimer, J.W. Schmidt, C.A. Zehnder) "Modula/R Report", LIDAS Memo 091-83, ETH Zurich, Sep 1983.

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Modula-P ♦ Modula-Prolog ♦ **Modula/R** ♦ modular arithmetic ♦ Modular C

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## modular arithmetic

(Or "clock arithmetic") A kind of integer arithmetic that reduces all numbers to one of a fixed set [0..N-1] (this would be "modulo N arithmetic") by effectively repeatedly adding or subtracting N (the "modulus") until the result is within this range.

The original mathematical usage considers only *equivalence*
modulo N. The numbers being compared can take any values,
what matters is whether they differ by a multiple of N.
Computing usage however, considers modulo to be an operator
that returns the remainder after integer division of its first
argument by its second.

Ordinary "clock arithmetic" is like modular arithmetic except that the range is [1..12] whereas modulo 12 would be [0..11].

Last updated: 2003-03-28

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Modula-Prolog ♦ Modula/R ♦ **modular arithmetic** ♦ Modular C ♦ MODUlar LAnguage

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## Modular C

A preprocessor-based extension to C allowing modules.

[Article by Stowe Boyd, Azrex Inc, SIGPLAN Notices, ca 1980].

Last updated: 1994-10-25

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modular arithmetic ♦ **Modular C** ♦ MODUlar LAnguage ♦ Modular Prolog

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## MODUlar LAnguage

<*language*>

(Modula) Wirth's 1977 predecessor of Modula-2. The original Modula was, more oriented toward concurrent programming, but otherwise quite similar.

["Modula - A Language for Modular Multiprogramming", N. Wirth, Soft Prac & Exp 7(1):3-35, Jan 1977].

Last updated: 1999-07-12

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Modular C ♦ **MODUlar LAnguage** ♦ Modular Prolog ♦ Modular SB-Prolog

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## Modular Prolog

An interpreter for SB-Prolog version 3.1 extended with ML-style modules. Runs on SPARC. Distributed under GNU General Public License.

*ftp://ftp.dcs.ed.ac.uk/pub/dts/mod-prolog.tar.Z*. E-mail:
Brian Paxton *<mprolog@dcs.ed.ac.uk>*.

["A Calculus for the Construction of Modular Prolog Programs", D. Sannella et al, J Logic Prog 12:147-177 (1992)].

Last updated: 1994-10-25

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Modular C ♦ MODUlar LAnguage ♦ **Modular Prolog** ♦ Modular SB-Prolog ♦ module

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## Modular SB-Prolog

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MODUlar LAnguage ♦ Modular Prolog ♦ **Modular SB-Prolog** ♦ module ♦ Modulex

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