1957 introductions

Indian National calander format

American stock market index

type of semiconductor diode

historical period started in 1957

Songbun (), formally chulsin-songbun (, from Sino-Korean 出身, "origin" and 成分, "constituent"), is the system of ascribed status used in North Korea. According to the U.S. Committee for Human Rights in North Korea and the American Enterprise Institute, it is based on the political, social, and economic background of one's direct ancestors as well as the behavior of their relatives; according to the North Korean secret police, songbun is used to classify North Korean citizens into three primary castes—core, wavering, and hostile—in addition to approximately fifty sub-classifications, and determin

spaceflight where spacecraft orbits astronomical body

focusing on what is irrelevant but easy to understand

semiconductor electronic device with three p–n junctions, mainly used in devices where the control of high power is demanded

proposed union of Romance-language-speaking Central African countries

the consort of the Yang di-Pertuan Agong, the constitutional federal monarch of Malaysia

the paradox that larger the electorate, the less each vote matters

any synthetic polymer fiber made predominately olefin units

right|thumb|300px|The 35 mm 8 perforation Technirama horizontal camera film. Note the circle has been squeezed horizontally by a factor of 1.5. __NOTOC__ Technirama is a screen process that has been used by some film production houses as an alternative to CinemaScope. It was first used in 1957 but fell into disuse in the mid-1960s. The process was invented by Technicolor and is an anamorphic process with a screen ratio the same as revised CinemaScope (2.35:1) (which became the standard), but it is actually 2.25:1 on the negative.