Computer

• Computer


  An electronic device that manipulates information or data according to the set of the instructions
• Computer


  • Has ability to store, retrieve, and process data
• The first computer has been derived from Latin language
• Functions of a computer


  • Input
  • Processing
  • Output
  • Storage
• Input


  Information or data that is entered into a computer
• Processing


  Sequence of actions taken on data to convert it into a information which is meaningful to the user
• Output


  Makes processed data available to the user
• Storage


  Stores data and programs permanently
• Siddhartha was the first computer developed in India
• Alan Turing is known as the Father of the modern computer
• John von Neumann was introduced first architecture of computer in the year 1948
• Transistors were invented by Bell laboratory
• In 1958, Jack St. Clair Kilby and Robert Noyce invented the first IC
• Analog computer


  Carries out arithmetic and logical operations by manipulating and processing of data
• Analog computer


  • Watches, Speedometer, Mercury thermometer
• Digital computer


  Does work by calculating the binary digits, performs mathematical calculations, combines bytes to produce desired graphics, sounds
• Digital computer


  • Desktop (PC)
• Hybrid computer


  Combination of analog and digital computers
• Hybrid computer


  • Machines used in hospitals like ECG and DIALYSIS
• General purpose computer


  Used to solve variety of problems by changing the program or instructions
• General purpose computer


  • To make small database, calculations, accounting
• Special purpose computer


  Used to solve a single and dedicated types of problem
• Special purpose computer


  • Automatic aircraft landing, multimedia computer
• Microcomputer


  Least powerful, most widely used, portable computers with a microprocessor as its CPU
• Microcomputer


  • Tablets, Smartwatches, PC, laptop
• Minicomputer


  Smaller in size, faster and cost lower than mainframe computers, used as central computer known as Server
• Minicomputer


  • IBM-17, DEC PDP-11, HP-9000
• Mainframe computer


  Having large internal memory storage and comprehensive range of software, serves as a backbone for the entire business world
• Mainframe computer


  • IBM-370, IBM-S/390, UNIVAC-1110
• Supercomputer


  Fastest and most expensive machines, have high processing speed, used for highly calculation intensive tasks
• Supercomputer


  • CRAY-1, PARAM, PARAM ISHAN
• The word computer has been derived from Latin language
• Input, output and processing devices


  Represent a computer system
• Four major functions of a computer


  • Input
  • Process
  • Output
  • Storage
• Processing


  Collecting the data and converting it into information
• Computer cannot perform thinking
• Input


  • Part number, description and number of parts ordered
• Benefits of computers


  • Very fast
  • Can store huge amount of data
  • Provide accurate output
• Data


  Collection of unprocessed items
• Information


  Data that has been organised and presented in a meaningful fashion