O licencama Windowsa

http://www.positive.rs/software/windows/

http://www.ferum.rs/2016/04/29/novosti/


http://www.poreskauprava.gov.rs/sr/o-nama/softver/softver.html


http://www.romsym.rs/index.php?option=com_content&task=view&id=227&Itemid=105



https://www.pctrikovi.com/tutorijali-i-savjeti/211-oem-ili-retail



https://www.microsoft.com/en-us/howtotell/Hardware.aspx