computer basics. what is a computer? a computer is a machine that can take inputs from the user,...
Post on 20-Dec-2015
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Computer Basics
What is a Computer?
A machine that can:1. Receive an input2. Process the data3. Produce a result in a desired format4. Store information as needed
Types of Computers
1) Super Computers2) Mainframes3) Personal Computers4) Laptops
Parts of a ComputerHardware Software
Hardware
The Physical portion of the computer1) Input- keyboard, mouse2) Output- monitor3) Storage- hard drive (internal), thumb drive4) Memory- RAM (random access memory)5) Central Processing Unit (Microprocessor)
The Computer System Unit
• The “computer tower”a. Power Supplyb. Mother Board
1. CPU2. RAM (memory)
c. Expansion slotsd. Drive Bays
- Hard Drive
– Universal Serial Bus
.
Peripherals
Your Input and Output DevicesOutput: Monitor, Printer
Input: Mouse, Keyboard, CD ROM
Input/Output: Hard Drive, CD R/CD RW, Modem
Bits and Bytes
Computers use a binary code to represent data
Bit= a 0 or a 1Byte= 8 Bits (for example a letter or a space)
– Kilobyte=1,024 bytes– Megabyte=1,024,000 bytes– Gigabyte=1,024,000,000 bytes– Terabyte=1,024,000,000,000 bytes
Discuss Computer Speed (Htz)
Software
The Program portion of the computer1) Operating System Software- tells hardware how to run properly2) Application Software- programs users can run to accomplish a task
ex: Microsoft Word©
Operating System (OS)
Operating System- allows hardware to communicate with application software
Windows XP
Types of OS
1) Graphical User Interface (GUI)- ex Windows 98- contains graphics and icons, navigated by mouse
2) Multi-User- ex Windows XP- more then one user can access the computer at the same time
3) Multiprocessing- ex Windows XP- capable of utilizing more then one processor at the same time
4) Multitasking- ex Windows XP- allows multiple software programs to run at the same time