IRC is actually a kind of conference system. However, it is very time consuming. Future for discussion groups will have phone and video conferences. 2 min 4 NDT'ers on the Chat. A large NDT Internet source is the Ultrasonic Testing -Online Journal There are many resources available for UT as well as for other NDT methods.
Databases are an important part of the Internet.
We thank you for your interest and you are invited for Internet access.