A batman or orderly is a soldier or airman assigned to a commissioned officer as a personal servant. Before the advent of motorized transport, an officer's batman was also in charge of the officer's "bat-horse" that carried the officer's kit during a campaign. This British English term is derived from the obsolete bat, meaning "pack saddle".

A domestic worker is a person who works within a residence and performs a variety of household services for an individual, from providing cleaning and household maintenance, or cooking, laundry and ironing, or care for children and elderly dependents, and other household errands. The term "'domestic service" applies to the equivalent occupational category. In traditional English contexts, such a person was said to be "in service".