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Published byGertrude Reynolds Modified over 8 years ago
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Computer Software Computer Technology Day 5
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Software Provides step-by-step instructions that tell the computer how to perform Categories System Software Application Software
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System Software Controls computer’s operations Manages computer’s resources Includes operating system, utilities, and computer programming tools
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Operating System Software Controls the allocation of hardware resources Handles basic input and output (I/O) for data flowing from and to storage devices and peripherals Enables application software to access system resources Allocates resources and processing time between several programs that are running at the same time (also known as multitasking)
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Multitasking More than one program can run at a time. Instructions and data from one area of memory do not interfere with memory allocated for other programs. Enables users to perform multiple tasks at the same time Copy a chart from an open Excel document, then pasting it into a report in Word and Download a document from the Web
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Operating Environment Operating system software or “platform” Windows Macintosh Types Command-line interface—user must type in commands to control the computer Graphical user interface (GUI)—users interact with the computer by using a mouse to point and click on icons, buttons, and menus
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System Software Terms Device driver—controls input and output to the peripherals Virus checker—searches files for potentially harmful programs (for example, viruses, worms, or Trojan horses) Firewall—protects your computer from unauthorized access over a network Utilities—programs that perform a very specific task (for example, managing system resources)
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Application Software Runs on top of the operating system Enables the user to perform a specific task Word processing a letter Calculating payroll in a spreadsheet Reading e-mail messages Manipulating digital photos Managing a database of information
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Application Types Word Processors (for example, MS Word) Users can create a variety of business documents WYSIWIG (What You See Is What You Get) display Spreadsheet (for example, MS Excel) Worksheet consisting of rows and columns Enable business and financial people to create “what if” scenarios Database Management (for example, MS Access) Graphics (for example, Adobe Photoshop)
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Application Types Presentation (for example, MS PowerPoint) Web Authoring (for example, Dreamweaver) Integrated Packages–combine functions from several different application programs
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