how easily we use computers
do u now how many hard works behind the easiness
firt generation computer made for purpose to punch paper card
In 1837, Charles Babbage was the first to conceptualize and design a fully programmable mechanical computer
and his analytical engine
In 1880 Herman Hollerith invented the recording of data on a machine-readable medium
To process these punched cards he invented the tabulator, and the keypunch machines
First generation computers used to Calculate
after these procces late few years 
more people find solutions to remove vacume tubes and setted processors
until forth generation computers
operating system used for computer was
Unix and BSD
Unix and BSD
Windows 95, Windows 98, Windows NT, Windows 2000, Windows Me, Windows XP, Windows Vista, Windows 7, Windows 8
DOS	86-DOS (QDOS), PC-DOS, MS-DOS, DR-DOS, FreeDOS
Mac OS	Mac OS classic, Mac OS X
Embedded and real-time	List of embedded operating systems
Experimental 

datas used in computer
Data Protocol	
File format

User interface in computer	
Graphical user interface 
Text-based user interface

Office suite
Internet Access	
Design and manufacturing
graphics

now computers made human works easier and still there are processing for the
future improvement of computer