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Healthcare Information Technology Exam Guide for CompTIA Healthcare IT Technician and HIT Pro Certifications by Brian Gugerty, Kathleen McCormick

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Operating Systems

Operating systems have evolved to make writing programs and running computer systems easier by handling lower-level computer functions instead of operating at the machine or assembly language level. Essentially, an operating system creates a virtual layer or machine, where functions or operations are simulated with software rather than actually existing in the hardware. The functions of an operating system are as follows:

Process management A process is an individual program or operation, such as a word processing application being run on a PC. Each process needs resources to run to completion (e.g., CPU time, memory, files, and input/output devices), and the operating system manages this.

Memory management For a program ...

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