A machine

One or more pieces of equipment on or with which gymnastics is performed.

A fire engine or fire truck

Golgi apparatus (also called a Golgi body, Golgi complex, or dictyosome) is an organelle found in most eukaryotic cells.

Laboratory equipment

Apparatus theory, derived in part from Marxist film theory, semiotics, and psychoanalysis, was a dominant theory within cinema studies during the 1970s.

Reference tools added to a book, apart from the text, such as variant readings or translations, textual notes, a concordance, a bibliography or an index, designed for the use of scholars studying the book.

The State apparatus, the formal and material means (including the repressive state apparatus: legal system, the police, armed forces, etc.) by which the ruling class exercises power: a term used by some Marxist theorists including Louis Althusser (see Ideological State Apparatuses).

The Red Jumpsuit Apparatus, a post-hardcore band.