operations and maintenance (O&M)

remove & repair (R&R; R & R)

remove & replace (R&R; R & R)

remove & restore (R&R; R & R)

Directions & Guidance (D&G)

planning & scheduling (P&S)

planning boards & committees (PB&Cs)

Army Mobilization and Operations Planning & Execution System (AMOPES)

operations and support (O&S)

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

Assistant Chief of Staff - Operations & Plans (G3)

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

acquisition, technology, and logistics (AT&L)

Army Fuels and Lubricants Working Party (ARMY F&LWP)

Evasion and Recovery (E&R)

indications and warnings (I&W)

Logistics and Resources Division (L&R)

movement and transportation (M&T)

research and development (R&D)

research and technology (R&T)

research, development, test, and evaluation (RDT&E)

rest and recuperation (R&R)

science and technology (S&T)

Technology Security and Foreign Disclosure (TS&FD)

Under Secretary of Defense for Acquisition, Technology, and Logistics (USD AT&L)

initial operational test and evaluation (IOT&E)

in-phase and quadrature (I&Q)

detect and avoid (D&A / DAA)

Aeroplane and Armament Experimental Establishment (A&AEE)

airborne early warning and control (AEW&C)

contingency maintenance / special maintenance

maintenance checks / routine maintenance, scheduled tasks

maintenance idling (periodic running of engine for maintenance purposes)