Essential Introduction to Computers Mr.Downing 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? Input Memory Storage Processor Output Memory Storage Output Input Processor I need 3 volunteers!
Information Processing Cycle (4 basic functions of a computer) Input Processing Output Storage Example: Report Card
Input Devices Any hardware component that allows you to enter data, programs, commands, and user responses into a computer Examples??
Processor Also called CPU (Central Processing Unit) Interprets and carries out the basic instructions that operate a computer 2 parts Control unit interprets instructions Arithmetic/logic unit performs arithmetic and logical processes
Output Devices Output devices make the information resulting from processing available for use Output Device Examples??
Storage Devices Used to store instructions, data, and information when they are not being used in memory Floppy disk Hard disk CD/DVD (ROM, R, RW) Tape Flash drive
Memory 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
Computer Mobile Devices PDA (personal digital assistant) Notebook computer Smartphone Pocket PC
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?