Etymology
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visual (adj.)
early 15c., "pertaining to the faculty of sight;" also "coming from the eye or sight" (as a beam of light was thought to do), from Late Latin visualis "of sight," from Latin visus "a sight, a looking; power of sight; things seen, appearance," from visus, past participle of videre "to see" (see vision). Meaning "perceptible by sight" is from late 15c; sense of "relating to vision" is first attested c. 1600. The noun meaning "photographic film or other visual display" is first recorded 1944.
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system (n.)
1610s, "the whole creation, the universe," from Late Latin systema "an arrangement, system," from Greek systema "organized whole, a whole compounded of parts," from stem of synistanai "to place together, organize, form in order," from syn- "together" (see syn-) + root of histanai "cause to stand," from PIE root *sta- "to stand, make or be firm."

Meaning "set of correlated principles, facts, ideas, etc." first recorded 1630s. Meaning "animal body as an organized whole, sum of the vital processes in an organism" is recorded from 1680s; hence figurative phrase to get (something) out of one's system (1900). Computer sense of "group of related programs" is recorded from 1963. All systems go (1962) is from U.S. space program. The system "prevailing social order" is from 1806.
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Dewey Decimal system (n.)

library classification system that organizes information into 10 broad areas subdivided numerically into progressively smaller topics, by 1885, named for Melvil Dewey (1851-1931) who proposed it 1876 while acting librarian of Amherst College. He also crusaded for simplified spelling and the metric system.

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representational (adj.)

"pertaining to or of the nature of representation," 1855, originally in philosophy, from representation + -al (1). Specifically of visual arts by 1923. Related: Representationally.

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visualize (v.)
1817, first attested in, and perhaps coined by, Coleridge ("Biographia Literaria"); see visual + -ize. Related: Visualized; visualizing.
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contrapposto (n.)

in visual arts, "arrangement of a figure so that the action of the upper body is strongly contrasted with that of the lower," 1903, from Italian contrapposto, past participle of contrapporre, from Latin contraponere "to place opposite, to oppose to" (see contraposition).

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Isis 
Egyptian goddess, from Greek Isis, from Egyptian Hes, female deity identified by the Greeks with Io. She is distinguished in visual representations by the solar disc and cow horns on her head.
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DOS 

"computer operating system using a disk storage device," 1967, acronym of disk operating system.

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