11:58
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
smartphones. 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: the
Lehmer sieve is an example of a digital non-electronic computer, while analog
computers are examples of non-digital computers which can be electronic (with
analog electronics), and mechanical computers are examples of non-electronic
computers (which may be digital or not). An example of a computer which is both
non-digital and non-electronic is the ancient Antikythera mechanism found in
Greece. All kinds of computers, whether they are digital or analog, and
electronic or non-electronic, can be Turing complete if they have sufficient
memory. A digital electronic computer is not necessarily a programmable
computer, a stored program computer, or a general purpose computer, since in
essence a digital electronic computer can be built for one specific application
and be non-reprogrammable. As of 2014, most personal computers and smartphones
in people's homes that use multicore central processing units (such as AMD FX,
Intel Core i7, or the multicore varieties of ARM-based chips) are also parallel
computers using the MIMD (multiple instructions - multiple data) paradigm, a
technology previously only used in digital electronic supercomputers. As of
2014, most digital electronic supercomputers are also cluster computers, a
technology that can be used at home in the form of small Beowulf clusters.
Parallel computation is also possible with non-digital or non-electronic
computers. An example of a parallel computation system using the abacus would
be a group of human computers using a number of abacus machines for computation
and communicating using natural language.
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
smartphones. 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: the
Lehmer sieve is an example of a digital non-electronic computer, while analog
computers are examples of non-digital computers which can be electronic (with
analog electronics), and mechanical computers are examples of non-electronic
computers (which may be digital or not). An example of a computer which is both
non-digital and non-electronic is the ancient Antikythera mechanism found in
Greece. All kinds of computers, whether they are digital or analog, and
electronic or non-electronic, can be Turing complete if they have sufficient
memory. A digital electronic computer is not necessarily a programmable
computer, a stored program computer, or a general purpose computer, since in
essence a digital electronic computer can be built for one specific application
and be non-reprogrammable. As of 2014, most personal computers and smartphones
in people's homes that use multicore central processing units (such as AMD FX,
Intel Core i7, or the multicore varieties of ARM-based chips) are also parallel
computers using the MIMD (multiple instructions - multiple data) paradigm, a
technology previously only used in digital electronic supercomputers. As of
2014, most digital electronic supercomputers are also cluster computers, a
technology that can be used at home in the form of small Beowulf clusters.
Parallel computation is also possible with non-digital or non-electronic
computers. An example of a parallel computation system using the abacus would
be a group of human computers using a number of abacus machines for computation
and communicating using natural language.
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