Hide Files using CMD

http://www.instructables.com/id/Hide-Files-using-CMD-Not-d-Folder-Option-Method/

Project Management 2

https://www.mediafire.com/folder/2hcb4vgbehh5e/Nota_Cik_Zaidi

PPP Protokol & Frame Relay

https://www.mediafire.com/folder/jydd568j674mz/Nota_Cik_Nasir