Introduction to Computers and Information Systems CE 100: Module 1: Hardware

CPU (Central Processing Unit) Hard Disk RAM (Random Access Memory) 2 Computers have:

CPU (Central Processing Unit): Does the ‘thinking’ speed measured in gigahertz 3 Computers have:

RAM (Random Access Memory): Working memory; quick memory ROM (Read-only Memory) 4 Computers have:

Hard disk: Permanent storage (bank vault) 5 Computers have:

Items that can be seen, touched Have a physical presence Tangible 6 Hardware:

Cannot be seen or touched Has no physical presence Intangible Programs are software 7 Software:

Two types of software: operating systems software for the machine applications software software for the humans 8 Software:

9 Applications “Programs” You Your Computer’s Hardware Operating system

10 Software: Common operating systems: Windows (Windows 7) Mac OS (Mac OS X Lion) Linux (OS + distribution) Google Chrome OS*

11 Software: Common applications: Word processor Spreadsheet Database Presentation Browsing Photo editing

Mainframe Personal computers: Desktop (not portable) Laptop (portable) Notebook (portable) Tablet 12 Types of computers:

Laptop versus notebook: notebook is new name for laptop notebooks do not have CD drives but have plugs for external 13 Types of computers:

Tablet: A notebook with a touch sensitive screen and no keyboard 14 Types of computers:

Mobile devices: smartphones/iPhone PDAs multimedia player (iPod) 15 Types of computers:

Smartphones: Combines phone, with PDA, camera, multimedia player, web Browser, etc. 16 Types of computers:

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:

Multimedia player (iPod): Plays music/movies 18 Types of computers:

USB (Universal Serial Bus) Firewire Serial Parallel 19 Input/output ports:

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:

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

Mouse Keyboard Trackball Scanner Touchpad Stylus Joystick Web camera microphone 22 Input devices:

23 Input devices:

Monitor Printer Speakers Headphones 24 Output devices:

Both input and output: touchscreens 25 Hybrid devices:

Voice recognition (word processing) Screen readers Screen magnifiers On-screen keyboards 26 Devices and accessibility:

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:

28 Types of networks:

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

30 Connecting to a network: RJ-11 Modem RJ-45 NIC

31 Types of networks: Connection is: Dial-up or 56 kbps Broadband (ADSL) costs more faster flat-fee

Introduction to Computers and Information Systems CE 100: Semester Meeting