Generations of Computer 1st generation (1946-56) Very large size Vacuum tubes were used for data These tubes a lot of heat Very expensive Speed low 18000 tubes Hardware problems 2nd generation (1956-64) Vacuum tubes were replaced with transistors Size small or speed high Less hardware problems 3rd generation (1964-71) Transistors were replaced with IC.(integrated circuit)

Computer Fundamentals Full form of computer                         C         :           Commonly                         O         :           Operating                         M         :           Machine                         P          :           Particularly                         U         :           Used In                         T          :           Trade                         E          :           Education And                         R         :           Research We can say in other language, system to the computer. System:-             S                      :           Save             Y                     :           Your                S                      :           Sufficient             T                      :           Time             E                      :           Energy And             M                     :           Money What is definition of Computer? Computer is a device that can help solve problems by accepting the data ,perform arithmetic ,logical