Desktop Computer

Desktop Computer

1. What is Computer ? Computers  are  machines  that  perform  tasks  or  calculations according  to  a  set  of  instructions,  or  programs.  
2. The  first  fully electronic  computers,  introduced  in  the  1940s,  were  huge machines  that  required  teams  of  people  to  operate.  Compared to  those  early  machines,  today's computers  are  amazing. Not  only are  they  thousands  of  times  faster,  they  can  fit  on  your  desk,  on your lap,  or even in your pocket Computers  work through an interaction of hardware  and so ftware. Hardware  refers  to  the  parts  of  a  computer  that  you  can  see  and touch,  including  the  case  and  everything  inside  it.  
3. The  most important  piece  of  hardware  is  a  tiny  rectangular  chip  inside  your computer  called  the  central  processing  unit  (CPU),  or mi croprocessor.  It's  the  "brain"  of  your  computer — the  part  that translates  instructions  and  performs  calculations.  Hardware  items such  as  your  monitor,  keyboard,  mouse,  printer,  and  other components  are  often called hardware  devices,  or devices.