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A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership. They can either be tagged as POTD or displayed in a special page on that site...

Space Shuttle Endeavour (Orbiter Vehicle Designation: OV-105) was one of the orbiters of the Space Shuttle program of NASA, the space agency of the United States. Endeavour was the fifth and final spaceworthy NASA space shuttle to be built, constructed as a replacement for Challenger. Endeavour first flew in May 1992 on mission STS-49 and its last mission was in May 2011...

A water tower or elevated water tower is a large elevated water storage container constructed to hold a water supply at a height sufficient to pressurize a water distribution system. Pressurization occurs through the elevation of water; for every 10.20 centimetres (4.016 in) of elevation, it produces 1 kilopascal (0.145 psi) of pressure. 30 m (98.43 ft) of elevation produces roughly 300 kPa (43...

The T-80 is a main battle tank (MBT) designed and manufactured in the former Soviet Union. BMP-2 is a second-generation, amphibious infantry fighting vehicle introduced in the 1980s in the Soviet Union, following the BMP-1 of the 1960s...