Sinatra (disambiguation)
Frank Sinatra (1915–1998) was an American singer and actor.
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Sinatra (TV program)
Sinatra: Featuring Don Costa and His Orchestra was a 1969 Emmy nominated television special starring Frank Sinatra, broadcast Wednesday, November 5, 1969, on CBS.
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Logic (disambiguation)
Logic may refer to:
- Mathematical logic, a branch of mathematics that grew out of symbolic logic
- Philosophical logic, the application of formal logic to philosophical problems
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Boolean-valued function
A boolean-valued function (sometimes called a predicate or a proposition) is a function of the type f : X → B, where X is an arbitrary set and where B is a boolean domain, i.e. a generic two-element set, (for example B = {0, 1}), whose elements are interpreted as logical values, for example, 0 = false and 1 = true.
In the formal sciences, mathematics, mathematical logic, statistics, and their applied disciplines, a boolean-valued function may also be referred to as a characteristic function, indicator function, predicate, or proposition. In all of these uses it is understood that the various terms refer to a mathematical object and not the corresponding semiotic sign or syntactic expression.
In formal semantic theories of truth, a truth predicate is a predicate on the sentences of a formal language, interpreted for logic, that formalizes the intuitive concept that is normally expressed by saying that a sentence is true. A truth predicate may have additional domains beyond the formal language domain, if that is what is required to determine a final truth value.
Spectravideo
Spectravideo, or SVI, was an American computer company founded in 1981 as "SpectraVision" by Harry Fox. They originally made video games for Atari 2600 and VIC-20. Some of their computers were MSX-compliant or IBM PC compatible. They ceased operations in 1988.
History
SpectraVision was founded in 1981 by Harry Fox and Alex Weiss as a distributor of computer games, contracting external developers to write the software. Their main products were gaming cartridges for the Atari 2600 VCS, Colecovision and Commodore VIC-20. They also made the world's first ergonomic joystick, the Quickshot. In late 1982 the company was renamed to Spectravideo due to a naming conflict with OnCommand's Hotel TV system called SpectraVision.
In the early 1980s, the company developed 11 games for the Atari 2600, including several titles of some rarity: Chase the Chuckwagon, Mangia and Bumper Bash. A few of their titles were only available through the Columbia House music club.
The company's first attempt at a computer was an add-on for the Atari 2600 called the Spectravideo CompuMate, with a membrane keyboard and very simple programmability.
Young
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