Page 20 - Trackpad v5 class 4
P. 20

SECOND GENERATION

                 Timeline: 1950s
                 Technology: Transistors
                 Example of Computer: UNIVAC III, IBM 1401, IBM
                 700, and Honeywell 200, etc.
                 Features:
                     More efficient and economical
                     Smaller in size compared to first-generation computers
                     Could calculate data in seconds




                                                  THIRD GENERATION

                 Timeline: 1960s
                 Technology: Integrated Circuits or ICs (An IC is also called
                 a chip, and it houses a large number of transistors in it.)
                 Example of Computer: IBM 360, Apple 1, UNIVAC 1108,
                 and UNIVAC AC 9000

                 Features:
                     Faster and more economical than second-generation computers
                     Highly reliable

                     The keyboard and the mouse were used for input purposes
                     Used an operating system, thereby allowing many applications to run at one
                   time





                                                 FOURTH GENERATION

                 Timeline: 1970s

                 Technology: Microprocessor (A Microprocessor is the
                 entire CPU on a single chip. It is a VLSI circuit. VLSI
                 stands for very large-scale integration.)
                 Example  of Computer:  Desktop,  HP 9000, IMP PC,

                 Apple Macintosh
                 Features:
                     Reduction in the size of computer

                     More reliable than the earlier generation of computers with a great storage
                   device
                     Extremely powerful and can process millions of instructions per second





             18   Pro (Ver. 5.0)-IV
   15   16   17   18   19   20   21   22   23   24   25