Computers and Internet

1492 Words6 Pages
CHAPTER 1. INTRODUCTION TO COMPUTERS. -Central processing unit CPU… is the electronic device that interprets and carries out the basic instructions that operate the computer. -Data… is a collection of raw unprocessed figures and symbols computer uses data to create information. -Free ware… is software provided at no cost to a user by an individual or company. -Information…is data that is organized meaningful and useful. -Information appliance…is a computer with limited functionality whose main propose is to connect to the internet from home. -Information processing cycle…. the series of input process, output and storage activities. -Information system … hardware software data and people and procedures comprise an information system. -Input devices … any hardware component that allows a user to enter data and instructions into a computer. -Output…is data that has been processed into information. Computer process input data into output information. -Kiosk is a freestanding computer usually with touch screen that serves as an input device. -Mainframe is a large expensive very powerful computer that can handle hundreds of users. -Memory is a temporary holding place for data and instructions -Midrange server is more powerful and larger than a workstation. -Multimedia is a power user typically work with multimedia which they combine test graphics sound video and other media elements into one application. -Operating system is a set of programs containing instructions that coordinate all of the activities among the hardware devices. -Peripheral is an external device that attaches to the system unit. -Recourses…networks allow users to share recourses such as hardware devices, software programs, data, and information. -Server…a computer that manages the recourses on a network. Servers control access to the software, printers and other devices on the network. -Shareware…is a copyright software that is distributed free for trial period. -Software…is a series of instructions that tells the hardware how to perform tasks. -Storage…is an area in a computer that can hold information for future use. -Storage devices…records and retrieves items to and from a storage medium. Six of them are floppy disk, a zip drive, hard disk drive, CD-Rom drive, CD-RW and DVD-Rom drive. -System Software…consists of the programs that control the operations of the computer and its devices. CHAPTER 2. THE INTERNET AND WORLD WIDE WEB -Advanced Research Projects Agency (ARPA)…an agency of the U.S. Department of Defense. ARPA’s goal was to build a network that (1) would allow scientists at different locations to share information and work together on military and scientific projects and (2) could function even if part of the network were disabled or destroyed by a disaster such as a nuclear attack.
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