Essential Introduction to Computers Mrs. Bryant Computer Information Systems
What Is a Computer?
A computer is an electronic device, operating under the control of instructions stored in its own memory , that can accept data ( input ), process the data according to specified rules (process), produce results ( output ), and store the results ( storage ) for future use
What makes a computer so powerful? SPEED A computer can do billions of actions per second RELIABILITY Failures are usually due to human error, one way or another STORAGE A computer can keep huge amounts of data and is easily organized
What Are the Components of a Computer?
I need 3 volunteers! Input Memory Storage Processor Output
Information Processing Cycle (4 basic functions of a computer)
Example: Report Card
Any hardware component that allows you to enter data, programs, commands, and user responses into a computer
Also called CPU (Central Processing Unit)
Interprets and carries out the basic instructions that operate a computer
Control unit interprets instructions
Arithmetic/logic unit performs arithmetic and logical processes
Output devices make the information resulting from processing available for use
Output Device Examples??
Used to store instructions, data, and information when they are not being used in memory
CD/DVD (ROM, R, RW)
Also called RAM (Random Access Memory)
Temporarily stores instructions waiting to be executed by the processor, data needed by those instructions, and the results of processed data
Kilobyte, megabyte, gigabyte
Byte = 1 memory location ex. the letter A
System Unit Let’s See!! Video Link!!
Computer Mobile Devices
PDA (personal digital assistant)
It’s Your Turn! Find a partner.
Computers are everywhere. Watching TV, driving a car, using a charge card, ordering fast food, and typing a term paper all involve interactions with computers. Make a list of every computer you and your partner can recall that you encountered over the past week.
Create a timeline of at least 10 milestones/major advances in computer technology.
Who were some of the major contributors to computer technology (individuals, organizations, corporations)? List at least 4 and describe what they did.
How have businesses and our personal lives been affected by computer technology?