module

1. A self-contained component of a system, often interchangeable, which has a well-defined interface to the other components.
2. A standard unit of measure used for determining the proportions of a building.
3. A section of a program; a subroutine or group of subroutines.
4. A unit of education covering a single topic. · Which modules are you studying next year?
5. A pre-prepared adventure scenario with related materials for a role-playing game.
6. An abelian group equipped with the operation of multiplication by an element of a ring (or another of certain algebraic objects), representing a generalisation of the concept of vector space with scalar multiplication.
7. A fractal element.
8. A file containing a music sequence that can be played in a tracker. · I composed a number of techno and rave modules back in the 1990s.

Plural modules