computer science

noun
the science that deals with the theory and methods of processing information in digital computers, the design of computer hardware and software, and the applications of computers.

Origin:
1970–75

computer scientist, noun
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Collins
World English Dictionary
computer science
 
n
the study of computers and their application

Collins English Dictionary - Complete & Unabridged 10th Edition
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Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
computer science  
The study of the design and operation of computer hardware and software, and of the application of computer technology to science, business, and the arts.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Cryptology is a specialized branch of mathematics with some computer science
  thrown in.
Starting wages in computer science and engineering have increased steadily over
  time, for example, but wages in biology have not.
Indeed, there are those who argue that computer science is really a social
  science.
When your correspondent paid him a visit at the computer science and
  engineering department, he sketched out several of them.
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