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Why do we need to learn about computers? Hardware & Software Windows95 Desktop - GUI? Mice? Internet Explorer & Netscape Microsoft Applications: –Excel –Word –Access –PowerPoint
Computer - electronic device to input, process, store, and produce… Computer system includes computer, peripheral devices, and software
Microcomputers Desktop/Towers/Laptops/Hand Helds Minicomputers Mainframe Supercomputers
Physical components attached to the computer (inside and outside). Input and Output devices. Keyboard, mouse, speakers, monitor, printer, fax/sound cards, modems, RAM, microphone, hard drive, floppy drive, network cards, etc. Software - applications and systems software. Instructions that the computer uses to control system resources or to complete tasks. DOS, Windows, Mac. Office family, Lotus, Netscape, Internet Explorer, Virus scans, tax programs, computer games. GUI - Graphical User Interface
Memory is Electronic while Storage is Physical. Use memory to to help run the computer resources, use storage to save programs and data for future use. ROM vs. RAM –ROM - holds initial instructions, cannot be change –RAM - where programs reside when in use, temporary, WANT MORE!
Three main types of storage: Floppy Disks: 3 1/2 and 5 1/4 Hard Disks CD-ROMS - speed 1 byte = 8 characters (bits) 1,024 = kilobyte 1,024,000 = megabyte 1,024,000,000 = gigabyte 1,024,000,000,000 = ?? 1,474,560 bytes = 1 floppy disk HD 640 Mb = 1 CD-ROM 100 Mb= 1 zip drive 1 Gb = 1 Zip drive 40 Mb - 10 GB = 1 hard drive
Connects one computer to other computers and peripheral devices allowing you to share data and resources LAN/WAN/VAN Workstations/Terminals
Department of Defense Electronic Mail World Wide Web
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