DSST Intro to Computers

Database collection of interrelated files organized

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94. Database – collection of interrelated files organized according to common elements to simplify retrieval, databases use structured files to organize data (uniform format) 95. Relational Database – most common type of database used on PCs, organized into related tables, organized in rows, & columns. Microsoft Access is an example of relational database application – to allow users to sort data in different ways, key fields are used called sort key, index, or keyword, most allow multiple keys to sort, Primary key holds a unique record (i.e.: employee name, SSN,) collection of fields make up a record 96. Querying – calling up specific records in a database 97. Graphics Software – paint, photo editing, and drawing software (Harvard Graphics and MS PowerPoint) - graphic file formats include BMP, GIF, JPEG, PNG, TIFF – high quality printable files 98. Expert System – interactive computer program that helps users solve problems (ex: MYCIN, PROSPECTOR, CARES, CLUES and CLIPS) 99. Inference Engine – software that controls the search of the expert systems knowledge base and produces a conclusion 100. Multimedia Authoring Software – combines video, text, animation, graphics and sound to create a standalone application, popular with educational businesses, websites and business training centers
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101. Web Page Design Software – allows users to create web pages (Ex: Dreamweaver, Macromedia Flash, and MS FrontPage) 102. Web Browser Software – allows a user to find and access the various parts of the internet. (Example: MS Internet Explorer, Netscape Navigator, and Mozilla Firefox) 103. Analog Data – is measured in ranges (light switch example: dimmer light is analog and on/off is digital) 104. Digital Data – data that has been converted to digits such as 0 and 1’s.(binary digits), also includes text, numbers, graphics, sound and video 105. Modem – takes digital signals from a computer and converts them to analog signals to transmit over the phone lines, telephone is still the cheapest way to connect to the internet 106. Network – system of interconnected telephones, computers and other communication devices that can communicate and share data 107. LAN Network – network that connects personal computers within a limited geographical area (LAN – Local Area Network) – normally a single building or school computer lab. Users share the services of a centralized computer called a server 108. WAN network – network that covers a large geographical area such as a country (Wide Area Network – WAN) it connects many LANs and allow computers to communicate with other computers far away 109. Peer to Peer Network – workstations share responsibility for processing storage, printing, and communications task without a server, (Example: BitTorrent and Napster) 110. Print Server – manages one or more printers and stores printed images 111. Intranet – an organizations private network 112. Extranet – private intranets that grant access to selected vendors 113. VPN – Virtual Private network – connected to remote sites via the internet 114. Protocol – rules that govern the exchange of data between hardware and software on a communications’ network (example: TCP/IP is an example of a network communications protocol)
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Database collection of interrelated files organized...

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