operation and maintenance center
51Operational Test and Evaluation Force — (OPTEVFOR) seal Active December, 1947 – Present Country …
52Preventive maintenance — (PM) has the following meanings: The care and servicing by personnel for the purpose of maintaining equipment and facilities in satisfactory operating condition by providing for systematic inspection, detection, and correction of incipient… …
53Ministry of Highways and Infrastructure (Saskatchewan) — Ministries of the Government of Saskatchewan Ministry of Highways and Infrastructure (Saskatchewan) Minister Wayne Elhard Established 1917 …
54Transit Center at Manas — (Manas Air Base) Manas International Airport, Kyrgyzstan …
55Pittsburgh and Lake Erie Railroad — (red) and New York Central system (orange) as of 1918 …
56National Aeronautics and Space Administration — 38°52′59″N 77°0′59″O / 38.88306, 77.01639 …
57World Trade Center — Pour la tour en reconstruction, voir 1 World Trade Center. Pour les autres articles homonymes, voir World Trade Center (homonymie). Tours 1 et 2 du World Trade Center …
58World Trade Center (New York) — World Trade Center Pour les articles homonymes, voir World Trade Center (film).  Pour la tour en reconstruction, voir 1 World Trade Center …
59Data & Analysis Center for Software — The Data Analysis Center for Software (DACS) is one of several United States Department of Defense (DoD) sponsored Information Analysis Centers (IACs), administered by the Defense Technical Information Center (DTIC). It is technically managed by… …
60Interlochen Center for the Arts — is a privately owned, 1,200 acre (5 km²) arts education institution in Interlochen, Michigan, roughly 15 miles (24 km) southwest of Traverse City. Interlochen draws young people from around the world to participate in intensive… …