Introduction

What is the course about?  Concepts History History Data representation, logic Data representation, logic Hardware: CPU, memory, storage, IO, architecture, Instruction Set etc Hardware: CPU, memory, storage, IO, architecture, Instruction Set etc Software: OS and application software Software: OS and application software Network and communication Network and communication Algorithm Algorithm Software Engineering Software Engineering database database  Computer software and application package Exploring Office: Word, Powerpoint, Excel, Access, Exploring Office: Word, Powerpoint, Excel, Access, HTML language, webpage design HTML language, webpage design

What is a computer?  Computer - An electronic device that has the ability to store, retrieve, and process data and can be programmed with instructions that it remembers

Input  Input means to feed information into a computer words and symbols in a document words and symbols in a document Numbers for a calculation Numbers for a calculation pictures pictures

Processing  Data refers to the symbols that represent facts, ideas and objects  Processing is the way that a computer manipulates data performing calculations performing calculations sorting lists and numbers sorting lists and numbers drawing graphs drawing graphs  A computer processes data in a device called the central processing unit (CPU)

Chapter 1 Memory and Storage  A computer stores data so that it will be available for processing  Memory is an area of a computer that holds data that is waiting to be processed and for later use  Storage is the area where data can be left on a permanent basis

Chapter 1 Output  Computer output is the results produced by the computer reports reports documents documents music music graphs graphs pictures pictures  An output device displays, prints or transmits the results of processing

Chapter 1 Computer functions and operations

What’s so significant about a computer’s ability to store instructions?  A stored program means that a series of instructions for a computing task can be loaded into a computer’s memory  This concept allows you to use your computer for multiple tasks over and over again

Chapter 1 Computer Categories Computers are categorized into three main categories from least to most powerful: Computers are categorized into three main categories from least to most powerful: microcomputersmicrocomputers minicomputersminicomputers mainframe computersmainframe computers