computer info

Types of  Computer Computer is an electronic device which accepts the input and  processes them to give desired output .There are various  types of computer available in the market . Computers are broadly divided into the following four groups: On the basis of fork / functions  On the basis of size  On the basis of  brand  On the basis of model .  On the basis of Work/Function Analog Computer Analog computers solve problems by using continuously changing data such as temperature pressure or voltage .Analog computers are used  for scientific and engineering applications examples  of analog devices  are : Thermometer , Speedometer ,example of analog computer is  Plesley . Fig of  Analog Computer Digital Computer Digital computers are mainly general –purpose computers that represent and store data in discrete quantities or numbers ,In  these  computers all the processing is done in terms of ...

Generation of Computer Introduction Just sixty five years have passed since the first electronic computer was successfully completed .During the last seven decades ,computer industry has witnessed very rapid technological  progress .Phenomenal technological progress is often termed as the origin of information revolution  being witnessed today . The technological development often referred to by the term “generations “ The transition from generation to  other is marked by substantial improvement in the technology .The technological improvement  that marks the generation if also deferred to as “land –mark” improvement  over existing technology . Following are the different types of computer generations  ; First generations of computer  Second generations of computer  Third generations computer  Forth generations of computer  Fifth generations of computer  1.FIRST GENERATIONS OF COMPUTER (1942-1955) MAN COMPONENTS: ...

History of computer  Introduction For centuries man lived on earth without keeping records .He had no need for numbers and did no know to count .As he started to settle down in tribes , records and numbers became necessary .Sticks and pebbles ware used to count people  and animals .Later counting was done fingers and the fact that man has ten fingers led to the development of the decimal number  system .As nations grew trade commerce and  technology developed and the need to calculating aids were keenly felt . MECHANICAL CALCULATING ERA Abacus The earlier calculating device ,which is still in use today ,is the abacus .It was first used in china ,some  3000 years ago .It consists of a computer wooden  frame with parallel bars  with heads strung on them .Moving the beads along the bars does counting .There are various version of the Abacus .Experienced users can calculate vary fast using  the Abacus and even beat the electronic calculator i...