Module

Computer science and engineering

Modular design, the engineering discipline of designing complex devices using separately designed sub-components
Modular function deployment, a method in systems engineering and product development
Module, a measure of a gear's pitch
Ontology modularization, a methodological principle in ontology engineering

Modular programming, a software design technique
Loadable kernel module, an object file that contains code to extend the running kernel
Environment Modules, a software tool designed to help users manage their Unix or Linux shell environment
Modula-2 or Modula-3, programming languages which stress the use of modules

Computer module, an early packaging technique that combined several electronic components to produce a single logic element
Memory module, a physical "stick" of RAM, an essential piece of computer hardware
Multi-chip module, a modern technique that combines several complex computer chips into a single larger unit

Science and mathematics

Module (mathematics) over a ring, a generalization of vector spaces
G-module over a group G, in mathematics
Modular lattice a kind of partially ordered set
Modularity theorem (formerly Taniyama–Shimura conjecture), a connection between elliptic curves and modular forms
Module, in connection with modular decomposition of a graph, a kind of generalisation of graph components
Modularity (networks), a benefit function that measures the quality of a division of a Complex network into communities
Protein module or protein domain, a section of a protein with its own distinct conformation, often conserved in evolution
A cis-regulatory module, a stretch of DNA containing a number of genes that share joint regulation by the same transcription factors

Music

Module (musician), the solo project of New Zealand-based musician/producer Jeramiah Ross
Module file, a family of music file formats
Modular Recordings, a record label
Modular synthesizer, a type of electronic musical instrument
Sound module, electronic musical instrument without a human-playable interface

Other uses

Modular building: prefabricated building that consists of repeated sections called modules, used as house or other, some of them open source, in this case, open source hardware.
NTC Module, a Russian research and development center
ModulArt, a technique used in contemporary art where a large-structure painting is made up of multiple smaller modules.
Ford Modular engine, Ford's line of OHC V8 and V10 motors
Volvo Modular engine
Game module or expansion, an add-on publication for a role-playing game
- Adventure (Dungeons & Dragons), formerly referred to as a module
Vitruvian module, an architectural measure
A class, course, or unit of education covering a single topic

Computer science and engineering