Download Digital Computer

Digital Computer
 High speed programmable ,electronic device
 Recognize data by counting discrete signals representing
either high(1) or low(0) voltage state of electricity.
 Accurate
 Output is continuous but obtain when computation is
completed.
 Real time example: Digital watch
Micro Computer(Personal Computer)
 Consists of microprocessors, microchips and storage devices.
 Suitable for personal usage.
 Common PC suppliers are HP, DELL, HCL,
Compaq etc.
Mini Computer
 Small general purpose computer
 More
memory and processing capabilities than micro
computers.
 Used as servers in the network environment
 Common mini computers are PDP-II, PDP-45.
Mini Computer System
Mainframe Computer
 Several computer terminals (keyboard, monitor etc.) are
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plugged into a single mainframe.
Fast processing
Large storage
Occupy lot of space and require air conditioning
Non portable computer
Skilled staff is required to operate.
Common mainframe series are Superry, DEC, ICL, PDP 370
etc.
Mainframe Computer
Super Computer
 Most powerful and most expensive.
 Fast. Can perform millions of processes in a second.
 Ideal for handling large and highly complex problems that
require large processing such as weather forecasting, remote
sensing, image processing etc.
 Large memory.
 PARAM is India's first super computer.
Super Computer
Laptop and Hand Held Computer
 Very small in size and light in weight.
 Portable
Some other digital computers
Tablet PC
Smart Phone