maintenance, repair and operation (MRO)

maintenance, repair and overhaul (MRO)

material release order (MRO)

maintenance and repair equipment

medical equipment maintenance and repair

aircraft maintenance and repair

airframe repair / patch repair

patch repair / airframe repair

depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance

heavy maintenance/repair

operation and maintenance, Army (OMA)

contingency maintenance / special maintenance

maintenance checks / routine maintenance, scheduled tasks

maintenance idling (periodic running of engine for maintenance purposes)

organizational maintenance (O-level) (day-to-day work that standard airfield maintenance groups perform in support of airfield operations)

routine maintenance / scheduled tasks, maintenance checks

scheduled tasks / routine maintenance, maintenance checks

special maintenance / contingency maintenance

Naval Facilities Engineering Command Technical Publication - Maintenance Operation

maintenance operation

battle damage assessment and repair (BDAR)

repair and refitting battalion

class IX supplies (Repair parts and components)

repair, replacement, testing and inspection (of components)

observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)

clandestine operation; covert operation

humanitarian operation; humanitarian relief operation (HUMRO)

PZ operation (pick-up zone operation)

noncombatant evacuation operation (NEO); non-combat evacuation operation

communications and control systems maintenance

development and maintenance of morale

establishment and maintenance of protective measures

operations and maintenance (O&M)