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Pcs Definition | Personal Communications Service: a system of digital wireless communications, used esp. for mobile phones and often including additional features, as caller ID or paging. | |
From Dictionary
Related topics from Britannicacomputer
In 1982 a well-funded start-up firm called Compaq Computer Corporation came out with a portable computer that was compatible with the IBM PC. These first portables resembled sewing machines when they ...
industrial polymers, major
Marketed under the trademarked names Lexan and Merlon, among others, PC is a special type of polyester used as an engineering plastic. It has exceptional stiffness, mainly by virtue of having more ...
formal logic
In any system of logic it is necessary to specify which sequences of symbols are to count as acceptable formulas-or, as they are usually called, well-formed formulas (wffs). Rules that specify this ...
formal logic
Various propositional calculi have been devised to express a narrower range of truth functions than those of PC as expounded above. Of these, the one that has been most fully studied is the pure ...
formal logic
The simplest and most basic branch of logic is the propositional calculus, hereafter called PC, named from the fact that it deals only with complete, unanalyzed propositions and certain combinations ...
formal logic
Qualms have sometimes been expressed about the intuitive soundness of some formulas that are valid in "orthodox" PC, and these qualms have led some logicians to construct a number of propositional ...
formal logic
The basic idea of constructing an axiomatic system is that of choosing certain wffs (known as axioms) as starting points and giving rules for deriving further wffs (known as theorems) from them. Such ...
formal logic
Given the standard interpretation, a wff of PC becomes a sentence, true or false, when all its variables are replaced by actual sentences. Such a wff is therefore a proposition form in the sense ...
formal logic
PC is often presented by what is known as the method of natural deduction. Essentially this consists of a set of rules for drawing conclusions from hypotheses (assumptions, premises) represented by ...
Apple Inc.
This was a golden age for Apple; the company's revenues approached $10 billion, and it sold more than a million computers a year. Still, Apple's profits obscured the fact that its share of the market ...
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