1. Senem KUMOVA METİN // Fall 2008-2009 CS 115 Introduction to Programming Introduction to Computing

2. Senem KUMOVA METİN // Fall 2008-2009 What is a Computer? A computer is a machine that manipulates data according to a list of instructionsmachinedata instructions Simply a computer 1. takes information (or inputs) 2. processes it according to a set of instructions (a program) 3. gives back a result (or output)

3. Senem KUMOVA METİN // Fall 2008-2009 Computing Activity of using and developing computer technology, computer hardware and software.computercomputer hardware software Hardware is a general term that refers to the physical artifacts of a technologyartifactstechnology Software is a general term used to describe a collection of computer programs, procedures and documentation that perform some tasks on a computer systemcomputer programs procedures

4. Senem KUMOVA METİN // Fall 2008-2009 Key components of a Computer

5. Senem KUMOVA METİN // Fall 2008-2009 Key components of a Computer Input Devices Receiving sections of Computer Allow the user to control the machine Examples : Keyboard Mouse Microphone Scanner Etc..

6. Senem KUMOVA METİN // Fall 2008-2009 Key components of a Computer Output Devices Return the results of computer actions back to the user Examples : Monitor Speakers Printer

7. Senem KUMOVA METİN // Fall 2008-2009 Key components of a Computer CPU ( Central Processing Unit) ‘brain’ of the computer Follows the instructions provided by both the user (via input devices) and the program that is running in order to perform a task Involves a control unit, ALU (Arithmetic Logic Unit), registers...

8. Senem KUMOVA METİN // Fall 2008-2009 Key components of a Computer Memory Internal storage areas in the computer Retains information that has been entered through the input unit so that the information may be made available for processing when needed. RAM and ROM ROM - Read-only memory: On ROM, data is prerecorded for read only which can not be removed RAM - Random access memory: whose contents can be accessed (read, write and remove) in any order

9. Senem KUMOVA METİN // Fall 2008-2009 Key components of a Computer Secondary Storage Long term high capacity warehousing part of the computer Store both the programs that run on the system as well as the work that is created The most common storage device is a fixed magnetic disk that sits inside the machine and this is called the hard drive.