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Computer#Digital computers

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+#REDIRECT [[Computer#Digital computers]]
-In [[computer science]], a '''digital electronic computer''' is a [[computer]] machine which is both an [[electronic computer]] and a [[digital computer]]. Examples of a digital electronic computers include the [[IBM PC]], the [[Apple Macintosh]] as well as modern [[smartphone]]s. When computers that were both [[digital]] and electronic appeared, they displaced almost all other kinds of computers, but [[computation]] has historically been performed in various non-digital and non-electronic ways: [[analog computer]]s are examples of non-digital computers, and [[mechanical computer]]s are examples of non-electronic computers. An example of a non-digital and non-electronic computer is the ancient [[Antikythera mechanism]]. All kinds of computers, whether they are digital or analog, and electronic or non-electronic, can be [[Turing complete]] if they have sufficient [[computer memory|memory]]. A digital electronic computer is not necessarily a [[programmable computer]], a [[stored program computer]], or a [[general purpose computer]].
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-A digital computer can peform its operations in the [[decimal]] system, in [[binary]], in [[ternary]] or in other [[numeral system]]s. As of 2014, all digital electronic computers commonly used, whether [[personal computer]]s or [[supercomputer]]s, are working in the binary number system and also use [[binary logic]]. A few [[ternary computer]]s using [[ternary logic]] were built mainly in the [[Soviet Union]] as research projects (googling for it can lead to some web-based simulators of those ternary computers).
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-People living in the beginning of the [[21st century]] use digital electronic computers for [[computer storage|storing]] [[data]], such as [[photograph|photo]]s, [[music]], [[document]]s, and for performing complex mathematical computations or for communication, commonly over a worldwide [[computer network]] called the [[internet]] which connects many of the world's computers.  All these activities made possible by digital electronic computers could, in essence, be performed with non-digital or non-electronic computers if they were sufficiently powerful.
-Digital computers are inherently best described by [[discrete mathematics]], while analog computers are most commonly associated with [[continuous mathematics]].
-The philosophy of [[digital physics]] views the [[universe]] as being digital. [[Konrad Zuse]] wrote a book known as ''[[Rechnender Raum]]'' in which he described the whole universe as one all-encompassing computer.
-==See also==
-*[[Abacus]]
-*[[ENIAC]]
-*[[EDVAC]]
-*[[List of vacuum tube computers]]
-*[[History of computing hardware]]
-*[[List of transistorized computers]]
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