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first-ever working model of a mechanical computer, a fully
                 program controlled machine. This is why Charles Babbage is

                 known as the ‘father of computers’.


                 LADY ADA LOVELACE’S PROGRAMS                                                      Analytical Engine


                 The instructions given to Babbage’s Analytical Engine were in the

                 form of 0s and 1s and the first person to introduce this concept
                 was Lady Ada Lovelace. Since she was the first to introduce the

                 concept of programming, she is known  as the  first  computer
                 programmer.


                 GENERATIONS OF COMPUTERS                                                            Lady Ada Lovelace



                            Generations                                           Features

                                                          Huge in size

                  First Generation      (1940s)           Very expensive
                                                          Made up of vacuum tubes

                                                          Made up of transistors
                                                          Magnetic tapes were used to store data
                  Second Generation  (1950s)              Small in size and less expensive than
                                                         the first generation computer

                                                          Faster and reliable

                                                          Computers were made of ICs
                                                          Use of the ICs reduced the size and
                  Third Generation      (1960s)
                                                         increased the speed of the computers
                                                          More affordable and dependable

                                                          Microprocessors were invented

                                                          Small in size and could be placed on an
                  Fourth Generation  (1970s)             office table
                                                          Hard disk to store data
                                                          Introduction of GUI operating system

                                                          Use artificial intelligence

                                                          Improved size, cost, speed and
                  Fifth Generation        (1980s–        performance
                                        Present)
                                                          New versions of GUI operating
                                                         systems are developed.





                                                                                            Evolution of Computers
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