IntroductionIntroduction

What is the course about?What is the course about?

ConceptsConcepts HistoryHistory Data representation, logicData representation, logic Hardware: CPU, memory, storage, IO, architecture, Instruction Set etcHardware: CPU, memory, storage, IO, architecture, Instruction Set etc Software: OS and application softwareSoftware: OS and application software Network and communicationNetwork and communication AlgorithmAlgorithm Software EngineeringSoftware Engineering databasedatabase

Computer software and application packageComputer 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?

ComputerComputer - An electronic device that has - An electronic device that has the ability to store, retrieve, and process the ability to store, retrieve, and process data and can be programmed with data and can be programmed with instructions that it remembersinstructions that it remembers

Input

InputInput means to feed information into a means to feed information into a computercomputer words and symbols in a documentwords and symbols in a document Numbers for a calculationNumbers for a calculation picturespictures

Processing DataData refers to the symbols that represent refers to the symbols that represent

facts, ideas and objectsfacts, ideas and objects ProcessingProcessing is the way that a computer is the way that a computer

manipulates datamanipulates data performing calculationsperforming calculations sorting lists and numberssorting lists and numbers drawing graphsdrawing graphs

A computer processes data in a device A computer processes data in a device called the called the central processing unitcentral processing unit (CPU) (CPU)

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Memory and Storage A computer stores data so that it will be A computer stores data so that it will be

available for processingavailable for processing MemoryMemory is an area of a computer that is an area of a computer that

holds data that is waiting to be processed holds data that is waiting to be processed and for later useand for later use

StorageStorage is the area where data can be left is the area where data can be left on a permanent basison a permanent basis

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Output Computer Computer outputoutput is the results produced is the results produced

by the computerby the computer reportsreports documentsdocuments musicmusic graphsgraphs picturespictures

An output device displays, prints or An output device displays, prints or transmits the results of processingtransmits the results of processing

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Computer functions and operations

What’s so significant about a computer’s ability to store instructions?

A A stored programstored program means that a series of means that a series of instructions for a computing task can be instructions for a computing task can be loaded into a computer’s memoryloaded into a computer’s memory

This concept allows you to use your This concept allows you to use your computer for multiple tasks over and over computer for multiple tasks over and over againagain

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Computer Categories

Computers are categorized into three main Computers are categorized into three main categories from least to most powerful:categories from least to most powerful:• microcomputersmicrocomputers• minicomputersminicomputers• mainframe computersmainframe computers