Communication
Bells, alarms and telegraphs, all intended to facilitate communication at a distance.
Domestic timekeeping
Clocks and timekeepers primarily used in the home.
Metrology
Meters, timers and other measurement devices.
Networked timekeeping
Clocks and timekeepers working as part of a network.
Public timekeeping
Clocks and timekeepers intended to display the time in public settings, such as church towers, railway stations and pubs.