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A piece that makes up a whole, a part of an assembly

An electronic component

A component of a spatial vector

Component video, a type of analog video information that is transmitted or stored as two or more separate signals

Symmetrical components, in electrical engineering, analysis of unbalanced three phase power systems

Software componentry, a field of study within software engineering dealing with object-oriented design

Connected component (graph theory), a maximal connected subgraph

Component (thermodynamics), a chemically distinct constituent of a phase of a system

Component (group theory), a quasisimple subnormal subgroup

Component (VTA), a light-rail station in San Jose, California