History of computer and relative topics

COMPUTER:
       * Artificial Intelligent machine.
        * It's electric device.
        *It's storage device.
        *It's program device.
        *It reduce the human workload.
           GENERATION OF COMPUTER:
Gen-1=Vaccum Tube
Gen-2=Transistor
Gen-3=IC
Gen-4=Microprocessor
Gen-5=AI
What is operating system?
          An operating system is a set of software that manages computer hardware resource and provided common service for computer program.
Character user Interface(CUI):
*Windows 1.0
*Windows 2.0
*Windows 3.0
*Windows NT
*Windows 95
*Windows 98
Graphical user Interface(GUI):
*Windows ME
*Windows XP(2001)
*Windows Vista(2007)
*Windows 7(2009)
*Windows 8(2012)
*Windows 8.1(2014)
Version of Unix:
      *BSD
     *SVR 4
     *SUB
    *POSIX
    *Solaries
Smallest os:
   *puppy linuse 256MB.
  *They are 128 distributor.