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Hardware Basics 0325

A set of vocabulary from Chapter 2

QuestionAnswer
Computer System The computer and other support devices (peripheral devices) that work as a tem to (1)receive information as the user inputs it, (2) process that information per the directions that the user defines, (3) output the information in a usable format.
Arithmetic Logic Unit (ALU) The sector of the CPU that performs the mathematical calculations that are required in many data processing programs.
Memory Unit Allows storage of information.
Random Access Memory (RAM) Temporary Memory that is designed to hold new data and is available only while the computer is turned on.
Read-Only Memory (ROM) Permanent internal memory inside the system, is inaccessible by the user, and is used to store the instructions that are installed or programmed at the manufacturer.
Processor Speed Conveys how fast data can be moved in and out of the memory. Measured in megahertz or gigahertz.
Cache Provides a temporary storage area that provides a quick access to information.
Peripheral Devices Used to (1) input the information, (2) output the information into a form that is easily raed by the user, or (3) store the information for later use.
Input Devices Allow the input of data into the computer. Examples: keyboards, mice, scanners, Web cameras, etc.
Optical Character Recognition (OCR) Used to convert text via scanner.
Sound Card Allows the input of sound into the computer.
Classroom Response System (Clicker) A handheld device that resembles a TV remote that allows students to respond to questions posed by the instructor.
Resolution The clarity of the image that is seen on the computer screen.
Pixel A single colored square on the screen.
Dots Per Inch (DPI) Measures the resolution of printers.
Created by: MTYOUNG