12 -- Information Technology II

12 -- Information Technology II - CPA BEC STUDY UNIT 12...

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CPA BEC - STUDY UNIT 12 Information Technology II: Core Concepts A. HARDWARE 1. The central processing unit (CPU) is the “brain” of any computer. In a desktop computer, it is often referred to as the microprocessor. Random access memory (RAM) is also referred to as main memory or primary storage. Read-only memory (ROM) is permanent storage used to hold the basic low-level programs and data. Secondary storage devices hold data and programs that are not currently being used by the CPU, e.g., hard drives. Input-output devices are the hardware components that allow the user to input data into the computer and retrieve output, e.g., keyboard, mouse, monitor. B. SOFTWARE 1. Software refers to the programs (i.e., sets of computer instructions) that are executed by the hardware. Software can be described from two perspectives: (a) systems vs. application software and (b) the programming language in which the software is written. 2. Two major types of software. Systems software performs the fundamental tasks needed to manage computer resources (operating system and utility programs). Application
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12 -- Information Technology II - CPA BEC STUDY UNIT 12...

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