PBS

The Public Broadcasting Service (PBS) is an American public broadcaster and television program distributor. Headquartered in Arlington, Virginia, PBS is an independently operated non-profit organization and is the most prominent provider of television programs to public television stations in the United States, distributing series such as Keeping Up Appearances, BBC World News, NOVA scienceNOW, NOVA, Sesame Street, Doctor Who, PBS NewsHour, Walking with Dinosaurs, Masterpiece, Nature, American Masters, Frontline, and Antiques Roadshow.

Since the mid-2000s Roper polls commissioned by PBS have consistently placed the service as the most-trusted national institution in the United States. However, PBS is not responsible for all programming carried on public television stations, a large proportion of which (including most specials aired during multi-annually pledge drives) come from third-party sources, including member stations (such as WGBH, WETA-TV, WNET, WTTW National Productions), American Public Television and independent producers. This distinction is a frequent source of viewer confusion.

Democrat

Democrat or Democratic may refer to:

Places

See also

Presidential debate

Presidential debates may refer to:

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President

A president is the leader of a country or a division or part of a country, typically a republic, a democracy, or a dictatorship. The title "president" is sometimes used by extension for leaders of other groups, including corporate entities.

Etymologically, a president is one who presides (from Latin prae- "before" + sedere "to sit"; giving the term praeses). Originally, the term referred to the presiding officer of a ceremony or meeting (i.e., chairman), but today it most commonly refers to an executive official. Among other things, "President" today is a common title for the heads of state of most republics, whether presidential republics, semi-presidential republics or parliamentary republics.

Title

The title President is derived from the Latin prae- "before" + sedere "to sit." As such, it originally designated the officer who presides over or "sits before" a gathering and ensures that debate is conducted according to the rules of order (see also chairman and speaker). Early examples are from the universities of Oxford and Cambridge (from 1464) and the founding President of the Royal Society William Brouncker in 1660. This usage survives today in the title of such offices as "President of the Board of Trade" and "Lord President of the Council" in the United Kingdom, as well as "President of the Senate" (one of the roles constitutionally assigned to the Vice-President of the United States). The officiating priest at certain Anglican religious services, too, is sometimes called the "President" in this sense. However the most common modern usage is as the title of a head of state in a republic.

Video

Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media.

Video systems vary greatly in the resolution of the display, how they are refreshed, and the rate of refreshed, and 3D video systems exist. They can also be carried on a variety of media, including radio broadcast, tapes, DVDs, computer files etc.

History

Video technology was first developed for Mechanical television systems, which were quickly replaced by cathode ray tube (CRT) television systems, but several new technologies for video display devices have since been invented. Charles Ginsburg led an Ampex research team developing one of the first practical video tape recorder (VTR). In 1951 the first video tape recorder captured live images from television cameras by converting the camera's electrical impulses and saving the information onto magnetic video tape.

Video recorders were sold for $50,000 in 1956, and videotapes cost $300 per one-hour reel. However, prices gradually dropped over the years; in 1971, Sony began selling videocassette recorder (VCR) decks and tapes to the public.