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Computer | Definition, History, Operating Systems, & Facts
What is a Computer System? | Definition from TechTarget
What is a Computer System? - Definition from Techopedia
What are the parts of a computer? (article) | Khan Academy
What is a computer? (article) | Computers | Khan Academy
Computer - Wikipedia
What is a computer system? - BBC Bitesize
An introduction to computers and computer systems
What is a Computer System? (+ Types by Size and Data …
Principles of Computer Systems - MIT OpenCourseWare