A term used for designating two jobs or positions found in the same environment or industry where two persons are required to perform duties. The workers are usually furnished board and room or lodging in addition to remuneration for services performed.

Classifications are made according to specific duties performed by each worker, such as butler and cook or where both workers participate in performing overall duties, such as maintenance, housekeeping, and managing as manager, motel, manager, tourist camp, manager, trailer park, or as maintenance repairer, building.