The difference between Analog and Discrete
When used as adjectives, analog means in which the value of a data item (such as time) is represented by a continuous(ly) variable physical quantity that can be measured (such as the shadow of a sundial), whereas discrete means separate.
Analog is also noun with the meaning: something that bears an analogy to something else.
check bellow for the other definitions of Analog and Discrete
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Analog as an adjective (of a device or system):
in which the value of a data item (such as time) is represented by a continuous(ly) variable physical quantity that can be measured (such as the shadow of a sundial)
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Analog as a noun (countable):
something that bears an analogy to something else
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Analog as a noun (countable, biology):
an organ or structure that is similar in function to one in another kind of organism but is of dissimilar evolutionary origin
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Analog as a noun (chemistry):
a structural derivative of a parent compound that often differs from it by a single element
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Discrete as an adjective:
Separate; distinct; individual; non-continuous.
Examples:
"a government with three discrete divisions"
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Discrete as an adjective:
That can be perceived individually and not as connected to, or part of something else.
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Discrete as an adjective (electrical engineering):
Having separate electronic components, such as individual diodes, transistors and resisters, as opposed to integrated circuitry.
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Discrete as an adjective (audio engineering):
Having separate and independent channels of audio, as opposed to multiplexed stereo or quadraphonic, or other multi-channel sound.
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Discrete as an adjective (topology):
Having each singleton subset open: said of a topological space or a topology.
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Discrete as an adjective:
Disjunctive; containing a disjunctive or discretive clause.
Examples:
"I resign my life, but not my honour" is a discrete proposition."