Generations & Types of Computers B.Sc. Mathematics – Complimentary Course Aquinas College Eadacochin by Raju George Michael

Generation Separated by Time Ideology Appearance Functioning Style Complexity or Advancement Raju George Michael, Aquinas College, Edacochin

Criteria of Generation Division The technology or the type of component used in the processing section of a computer Raju George Michael, Aquinas College, Edacochin

Generations of Computer 1st Generation 2nd Generation 3rd Generation 4th Generation 5th Generation 1944 to 1954 1955 to 1964 1965 to 1974 1975 till date Not started yet Raju George Michael, Aquinas College, Edacochin

Generations of Computer 1st Generation 2nd Generation 3rd Generation 4th Generation 5th Generation Thermionic valve (Vacuum tube) based Individual semi-conductor component based Small Scale (SSI) to Large Scale (LSI) integration of semi-conductor component or generally IC based Very Large Scale Integration (VLSI) of semi- conductor component or microprocessor based Intelligent Processor based Raju George Michael, Aquinas College, Edacochin

Generations of Computer 1st Generation 2nd Generation 3rd Generation 4th Generation 5th Generation Electricity based Electronic based Not started yet Raju George Michael, Aquinas College, Edacochin

Generations of Computer 1st Generation 2nd Generation 3rd Generation 4th Generation 5th Generation Slower fast faster fastest Raju George Michael, Aquinas College, Edacochin

Generations of Computer 1st Generation 2nd Generation 3rd Generation 4th Generation 5th Generation Large Small Smaller Smallest Raju George Michael, Aquinas College, Edacochin

Generations of Computer 1st Generation 2nd Generation 3rd Generation 4th Generation 5th Generation Single Tasking & Multitasking Multi tasking Efficient Multitasking Raju George Michael, Aquinas College, Edacochin

Types of Computers Analog Computer Super Computer Micro Computer Laptop Computer Digital Computer Personal Computer Are these computers having the same features? What is the criteria for the categorisation? Raju George Michael, Aquinas College, Edacochin

Criteria for Categorisation Use of the Computer Size of the Computer Where computer is kept? Performance of the computer How data is processed, stored and transmitted? Raju George Michael, Aquinas College, Edacochin

Types of Computer Performance of the computer Super Computer Mainframe Computer Mini Computer Micro Computer Performance of the computer How data is processed, stored & transmitted? Analog Computer Digital Computer Hybrid Computer Raju George Michael, Aquinas College, Edacochin

Performance of the computer Super Computer Mainframe Computer Mini Computer Micro Computer Raju George Michael, Aquinas College, Edacochin

Super Computer Highest performing computer Special purpose computer (Scientific & Emergency) Single/Multi user but Multi-tasking computer Real-time processing Multi processing / Parallel Processing Costliest/Non-economic computer Raju George Michael, Aquinas College, Edacochin

Mainframe Computer High performance computer General purpose computer Multi user and Multi-tasking computer On-line processing Multi processing / Parallel Processing High Cost computer Raju George Michael, Aquinas College, Edacochin

Mini Computer Medium performance computer General purpose computer Multi user and Multi-tasking computer On-line processing Single/Multi processing Industry-standard Economy computer Raju George Michael, Aquinas College, Edacochin

Micro Computer Low performance computer Personal/Multi purpose computer Single user and Multi-tasking computer Low Cost/Economic computer Raju George Michael, Aquinas College, Edacochin

How data is processed, stored & transmitted? Analog Computer Digital Computer Hybrid Computer Raju George Michael, Aquinas College, Edacochin

Concept of Analog & Digital Analog is gradient/ continuous (slowly increasing) in nature Eg. Increase in speed of a vehicle, temperature rise in mercury thermometer Digital is incremental/discrete (jumping from one value to another) in nature Eg. Increase of runs in a cricket match, second increment in digital clock Raju George Michael, Aquinas College, Edacochin

Analog Data & Digital Data Analog data is gradient (slowly increasing) Digital is incremental/ discrete (jumping from one value to another) images Raju George Michael, Aquinas College, Edacochin

Criteria for Categorisation Creates a user interface towards machine A mean to provide different type of data for processing or storage User friendly manner A picture Raju George Michael, Aquinas College, Edacochin

Not just timely separated Computer is an automated electronic data processing machine Raju George Michael, Aquinas College, Edacochin

Summing Up At least one device from each category is needed for a computer to be functional Any number of devices from each category could be used Selection and integration of these four functional types together decides the overall performance of the computer Raju George Michael, Aquinas College, Edacochin

Expected Questions At least one device from each category is needed for a computer to be functional Raju George Michael, Aquinas College, Edacochin