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  2. Military mail - Wikipedia

    en.wikipedia.org/wiki/Military_mail

    DoD 4525.6-M, Department of Defense Postal Manual, 15 August 2002; DoD 4525.7, Military Postal Service and Related Services, 2 April 1981; Executive Order 12556, gives Secretary of Defense authority to designate free mail areas; U.S. Department of State DPO; Supporting Our Troops – USPS Military Mail info; Army Email; British Forces Post Office

  3. The Pentagon - Wikipedia

    en.wikipedia.org/wiki/The_Pentagon

    The Pentagon is the world's second-largest office building, with about 6.5 million square feet (600,000 m 2) of floor space, 3.7 million square feet (340,000 m 2) of which are used as offices. [ 6 ] [ 7 ] It has five sides, five floors above ground, two basement levels, and five ring corridors per floor with a total of 17.5 mi (28.2 km) [ 7 ...

  4. Global Positioning System - Wikipedia

    en.wikipedia.org/wiki/Global_Positioning_System

    [10] [12] [13] Consumer devices such as smartphones can be accurate to 4.9 m (16 ft) or better when used with assistive services like Wi-Fi positioning. [ 14 ] As of July 2023 [update] , 18 GPS satellites broadcast L5 signals, which are considered pre-operational prior to being broadcast by a full complement of 24 satellites in 2027.

  5. Heavy Expanded Mobility Tactical Truck - Wikipedia

    en.wikipedia.org/wiki/Heavy_Expanded_Mobility...

    The Heavy Expanded Mobility Tactical Truck (HEMTT) is an eight-wheel drive, diesel-powered, 10-short-ton (9,100 kg) tactical truck. [2] The M977 HEMTT first entered service in 1982 with the United States Army as a replacement for the M520 Goer, and since that date has remained in production for the U.S. Army and other nations.

  6. M4 carbine - Wikipedia

    en.wikipedia.org/wiki/M4_carbine

    The Block II program then focused on component improvements to the M4A1, with the adoption of the heavier "SOCOM profile" barrel in 2004 and free-float Rail Interface System II (RIS-II) handguard from Daniel Defense in 2008. Owing to the modularity of the AR-15/M4 platform, some operators have replaced issued optics, handguards, and buttstocks ...

  7. M109 howitzer - Wikipedia

    en.wikipedia.org/wiki/M109_howitzer

    M109: Detroit Diesel 8V71T 8-cylinder water-cooled turbocharged diesel engine 390 hp @ 2,300 rpm M109A1–A4: Detroit Diesel 8V71T 8-cylinder water-cooled supercharged diesel engine 405 hp @ 2.300 rpm

  8. World Geodetic System - Wikipedia

    en.wikipedia.org/wiki/World_Geodetic_System

    The WGS 84 datum surface is an oblate spheroid with equatorial radius a = 6 378 137 m at the equator and flattening f = 1 ⁄ 298.257 223 563. The refined value of the WGS 84 gravitational constant (mass of Earth's atmosphere included) is GM = 3.986 004 418 × 10 14 m 3 /s 2. The angular velocity of the Earth is defined to be ω = 72.921 15 × ...

  9. 3D Slicer - Wikipedia

    en.wikipedia.org/wiki/3D_Slicer

    3D Slicer (Slicer) is a free and open source software package for image analysis [1] [2] and scientific visualization. Slicer is used in a variety of medical applications, including autism , multiple sclerosis , systemic lupus erythematosus , prostate cancer , lung cancer , breast cancer , schizophrenia , orthopedic biomechanics , COPD ...