introduction to computers and information systems ce 100: module 1: hardware
Post on 18-Dec-2015
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TRANSCRIPT
Two types of software:
operating systems
software for the machine
applications software
software for the humans
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Software:
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Software:
Common operating systems:
Windows (Windows 7)
Mac OS (Mac OS X Lion)
Linux (OS + distribution)
Google Chrome OS*
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Software:
Common applications:Word processorSpreadsheetDatabasePresentationE-mailBrowsingPhoto editing
Mainframe
Personal computers:
Desktop (not portable)
Laptop (portable)
Notebook (portable)
Tablet12
Types of computers:
Laptop versus notebook:
notebook is new name for laptop
notebooks do not have CD drivesbut have plugs for external
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Types of computers:
Smartphones:
Combines phone, with PDA,
camera, multimedia player, web
Browser, etc.
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Types of computers:
PDA (Personal Digital Assistant):
Originally: used a stylus for inputand had to be synched
Today: much a like a smartphone.a combination device.
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Types of computers:
Many things influence speed:
size of CPU
size of RAM
size of graphics card memory
programs (processes) running
presence of malware/viruses20
Computer speed:
11,000
1,000,0001,000,000,000
Computers use bits of data
8 bits = letter, number, color, sound
8 bits = 1 byte
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Sizes:
TeraGigaMegaKilo
Voice recognition (word processing)
Screen readers
Screen magnifiers
On-screen keyboards
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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:
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Types of networks:
Client-server: a type of network
Clients: people using the network
Servers: computers that have a job:MailFilePrintweb