Please enable JavaScript.
Coggle requires JavaScript to display documents.
Overview of Computer System - Coggle Diagram
Overview of Computer System
Computer hardware
input devices
pointing devices
mouse, trackball, joystick, touchscreen, light pen, touch pad
keyboard,microphone,digital camera,
scanners: hand-held scanner, flatbed scanner,barcode reader
touchscreen:capacitive,resistive
cathode ray tubes,liquid crystal display,light emmiting diodes
monitor
printers
impact printers,non impact printers
impact printers: dot matrix and chain printer
non impact printers: inkjet and laser printer
plotters
flatbedploter,drumplotter
automatic data capturing devices
magnetic card reader,magnetic ink character reader,optical character reader,barcode reader,optical mark reader,quick responce code reader
magnetic ink character reader: it is used to verify the legitimacy or originality of paper documents, especially checks.
quick responce code reader:it is used to provide easy access to online information through the digital camera on a smartphone or tablet
magnetic card reader:it is used to read the information stored within the magnetic stripe of special cards such as credit cards and ATM cards.
barcode reader:it is used to capture and read information contained in a bar code .
optical character reader:converting printed paper documents into machine-readable text documents
optical mark reader:it reads the mark of pencils made on predefined positions on the OMR sheets
Computer software
System software
Operating system,device drivers, utility software, language processors
Application software
Productivity software,business software,entertainment software, educational software
business software:it is used to run business activities
entertainment software:it is used to entertain people
educational software:it is used for learning purpose
productivity software:it is used to improve the way people do their work
Internet application
Web applications, cloud computing applications,social media network applications
Licensed software, open source software,shareware,freeware
open source code: it is computer software that is available in the form of source code
shareware:it is given to people free of charge for a limited time period
licensed software: legal agreement,when a person purchased the software he is allowed to use the software
freeware:it is available for use free of cost
Introduction to computers
Computing devices
Atm machine,digital alarm clock,cell phones
specialised computers
Computer hardware and software
Hardware
all the physical components of computer
Software
a set of instructions, data or programs used to operate computers and execute specific tasks.
Basic operation of a computer
Input operation
accepting data
Output operation
sending results
Processing operation
Storage operation
write data to storage device hard disk
performing operations
Classification of digital computers
Mainframe computer
Ibm's zEnterprize ec12
Minicomputer
Ex:dec pdp, vax series
Micro computer ex:ibm thinkpad
Super computer