Maintenance

Maintenance see Maintenance, Repair and Operations; for railroad usage, see maintenance of way.
Maintenance is a legal term of art that is used to describe child support, alimony (also called spousal support), and champerty. It is less commonly used to describe unlawful conduct where a third-party provides help to a litigant who does not have a bona-fide interest in a lawsuit.
Maintenance is an industry term that is used to describe software maintenance in the computer software industry
Maintenance is an industry term that is used to describe preventive maintenance in manufacturing, e.g. "schedule maintenance on the grinding machine"