National Informatics Centre, DIT, Govt. of India National Informatics Centre, DIT, Govt. of India AgendaComputer HardwareInput DevicesOutput DevicesSecondary StorageComputer SoftwareSystem SoftwareApplication SoftwareWorking wit WindowsComputer !etwork "asics National Informatics Centre, DIT, Govt. of India A Computer is a device which allows you toInput raw data#erform Computations$#rocessingStore te data for retrievalO%tain desired information National Informatics Centre, DIT, Govt. of India A computer is: An electronic macine tat can %e programmed to accept data &input'( and process it into useful information &output')Data is put in secondary storagefor safekeeping or later use) *e processing of input into output is directed %y te software( %ut performed %y te ardware) National Informatics Centre, DIT, Govt. of India COMPUTER TECHNOLOGY IS COMPLEX BUT BASED ON SIMPLE PRINCIPLEInstructions........................................Output as Inor!ationInput as Ra" DataStora#$ National Informatics Centre, DIT, Govt. of India Computers are devices powered %y electricity( wic as two discrete states+ On or Off)*wo digits represent tese states+ 0 for te electronic state of Off( and 1 representing On &te presence of an electronic carge') Co!put$rs proc$ss %ata &' !$ans o a &inar' s'st$!. National Informatics Centre, DIT, Govt. of India What are the main components ?HardwareSoftware National Informatics Centre, DIT, Govt. of India asic Computer Hardware National Informatics Centre, DIT, Govt. of India Computer systems consist of the following hardware components:!nput devices accept data or commands in a form usea%le %y computers) Data and commands can also %e sent to te processing unit, e)g)( key%oards( mice( scanners( micropone( digital camera)Output devices display te processed information understanda%ly and usefully, e)g) printers( monitors( speakers)"rocessing devices are contained in a computer-s system unit and are comprised of circuitry)*e main circuit %oard is te moter%oard( wit its central processing unit &C#.' and memory) National Informatics Centre, DIT, Govt. of India Storage devices include secondary storage for data and programs outside the computers processing unit; e.g. hard disk drives, foppy disk drives, Zip drives, CD-ROM, CD-RW and DVD-ROM drives. Drives read from and write to storage media (the physical material that can store data and programs).Communication devices provide connections between computers and communication networks, allowing for exchange of information and data with other computers via transmission media such as cables, telephone lines and satellites. National Informatics Centre, DIT, Govt. of India #raphic $epresentation of Computer Components: National Informatics Centre, DIT, Govt. of India Input D$(ic$sPROCESSORCPU,ALU, CUEOR!OUTPUT DE)ICESSecondar" Stora#e National Informatics Centre, DIT, Govt. of India %&' (S HA)& A %OO* !+S!,& National Informatics Centre, DIT, Govt. of India National Informatics Centre, DIT, Govt. of India T*$ Motherboard National Informatics Centre, DIT, Govt. of India National Informatics Centre, DIT, Govt. of India !+"(' ,&)!C&S$e"%oardScannero&seicro'(one)o"stic* National Informatics Centre, DIT, Govt. of India -ouse "ointer .orms Standard Pointer form. +orm ,(en c(an#in# a ,indo,-s (ei#(t+orm ,(en c(an#in# a ,indo,-s ,idt(+orm ,(en c(an#in# a ,indo,-s (ei#(t and ,idt( sim&ltaneo&sl"+orm ,(en c(an#in# a ,idt( of a field in a ta%le+orm ,(en insertin# t(e te.t+orm ,(en movin# a field to a ne, 'osition in t(e ta%le+orm ,(en a''lication %ein# e.ec&ted or a ,ait state National Informatics Centre, DIT, Govt. of India EscSPACE /ARCtr+ A+tNu!Loc,CapsLoc,Scro++Loc,Ctr+A+t-. -/ -0 -1 -2 -3 -4 -5 -.6 -..-./PrintScr$$n-7Scro++Loc,Paus$Br$a,89:.;/2?3@4A7B5C6DEFGIns$rt Ho!$Pa#$ UpTa&H IE T Y R U I OPJKLMNOD$+$t$ En%Pa#$ Do"nCapsLoc,A S D G H - P Q LRSTUEnt$rS*itV X C B N ) MWXY.Z[S*itNu!Loc,[ @E3Ho!$45P#UpF7 1 2.En%/0P#DnEnt$r6Ins.D$+ National Informatics Centre, DIT, Govt. of India "ar code Scanner*/ tuner cardDigital CameraDigital /ideo camera!+"(' ,&)!C&S Contd/ National Informatics Centre, DIT, Govt. of India O('"(' ,&)!C&SPrinter+a.onitorS'ea*ers National Informatics Centre, DIT, Govt. of India S&CO+,A$0 S'O$A#& ,&)!C&Sa#netic Ta'eCDRO+lo''"0ard Dis* National Informatics Centre, DIT, Govt. of India Disk drives Internal 0 12ternal Hard drives 3emova%le disk drives 4loppy disks &5)6 7"' 8I# disks &599$:;9 7"' CD