Latex is software for .tex . Latex is often used by scientist to make paper .
Ussualy paper is in form pdf, but actually sometimes it’s made by latex editor first which is complex.
In linux the program to convert latex to pdf is Tetex .
But in windows you can use :
http://miktex.org/ 
http://www.winshell.org/modules/ws_download/ winshell to edit and convert […]