This document defines and describes key aspects of information technology (IT) including system software like operating systems, application software, and common hardware devices. It also outlines some major categories of IT jobs like programmers, system analysts, database administrators, and system administrators. Overall, the document provides a broad overview of the main components of an IT system and some typical roles within the IT field.

3.  Information
technology IT)
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4. 






5.  system software
Microsoft Windows,
Mac OS X, Linux
application software)
end user)



 device drivers

 compilers
 assemblers
 linkers
 utility)

6.  application software)
 word processing) Micosoft Word,
OpenOffice Writer
 spreadsheet) OpenOfficeMicrosoft
Excel, Calc
 presentation) Microsoft Powerpoint,

7. 

8. 

9. 
pager)
Personal Digital
Assistant : PDA)
stylus)


10. 

on
demand


11. 




12.  programmer )
 system analyst
 database administrator)
 system administrator)