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Introduction to Computers and Information Systems CE 100: Module 1: Hardware
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CPU (Central Processing Unit) Hard Disk RAM (Random Access Memory) 2 Computers have:
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CPU (Central Processing Unit): Does the ‘thinking’ speed measured in gigahertz 3 Computers have:
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RAM (Random Access Memory): Working memory; quick memory ROM (Read-only Memory) 4 Computers have:
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Hard disk: Permanent storage (bank vault) 5 Computers have:
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Items that can be seen, touched Have a physical presence Tangible 6 Hardware:
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Cannot be seen or touched Has no physical presence Intangible Programs are software 7 Software:
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Two types of software: operating systems software for the machine applications software software for the humans 8 Software:
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9 Applications “Programs” You Your Computer’s Hardware Operating system
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10 Software: Common operating systems: Windows (Windows 7) Mac OS (Mac OS X Lion) Linux (OS + distribution) Google Chrome OS*
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11 Software: Common applications: Word processor Spreadsheet Database Presentation E-mail Browsing Photo editing
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Mainframe Personal computers: Desktop (not portable) Laptop (portable) Notebook (portable) Tablet 12 Types of computers:
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Laptop versus notebook: notebook is new name for laptop notebooks do not have CD drives but have plugs for external 13 Types of computers:
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Tablet: A notebook with a touch sensitive screen and no keyboard 14 Types of computers:
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Mobile devices: smartphones/iPhone PDAs multimedia player (iPod) 15 Types of computers:
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Smartphones: Combines phone, with PDA, camera, multimedia player, web Browser, etc. 16 Types of computers:
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PDA (Personal Digital Assistant): Originally: used a stylus for input and had to be synched Today: much a like a smartphone. a combination device. 17 Types of computers:
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Multimedia player (iPod): Plays music/movies 18 Types of computers:
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USB (Universal Serial Bus) Firewire Serial Parallel 19 Input/output ports:
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Many things influence speed: size of CPU size of RAM size of graphics card memory programs (processes) running presence of malware/viruses 20 Computer speed:
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1 1,000 1,000,000 1,000,000,000 Computers use bits of data 8 bits = letter, number, color, sound 8 bits = 1 byte 21 Sizes: Tera Giga Mega Kilo
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Mouse Keyboard Trackball Scanner Touchpad Stylus Joystick Web camera microphone 22 Input devices:
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23 Input devices:
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Monitor Printer Speakers Headphones 24 Output devices:
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Both input and output: touchscreens 25 Hybrid devices:
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Voice recognition (word processing) Screen readers Screen magnifiers On-screen keyboards 26 Devices and accessibility:
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WAN (Wide Area Network) connects ISPs LAN (Local Area Network) connects organizations PAN (Personal Area Network; Bluetooth) connects you to yourself 27 Types of networks:
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28 Types of networks:
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29 Types of networks: Client-server: a type of network Clients: people using the network Servers: computers that have a job: Mail File Print web
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30 Connecting to a network: RJ-11 Modem RJ-45 NIC
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31 Types of networks: Connection is: Dial-up or 56 kbps Broadband (ADSL) costs more faster flat-fee
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Introduction to Computers and Information Systems CE 100: Semester Meeting
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