Comparison of VPN Protocols IPSec PPTP and L2TP, Free PDF report course on 45 pages.

ourse material and training Computer basics (PDF file 16 pages)

XML : eXtensible Markup Language course material and training (PDF file 59 pages)

NXC is a programming language, invented by John Hansen, which was especially designed for the Lego robots. NXC is really easy to use and this tutorial will lead you on your first steps towards it.

course material and tutorial training on Web Services, PDF file by Alberto Manuel Rodrigues da Silva

You are strongly recommended to use SSH Secure Shell Client for connecting interactively and for file transfer whenever possible. PDF file.