(computing) Installer. A software utility that installs an application.

(informal) An installation. (Usage originated as a truncated form of the word installation.)

Connect, set up or prepare something for use, particularly in computing, by transferring software onto a device's permanent storage and putting it in a ready-to-run state.

(transitive) To admit formally into an office, rank or position.

(transitive) To establish or settle in.