Everything you possible might need in life!
I am in IT and I could think of about 0 situations where'd I'd need this.
A good way to access RFC
in french : Un bon moyen d'acceder au RFC
Don't know if I WOULD like it since there's no real explanation. Sure, it may be specifically for people who are "in the know" but unless you open a door or two, it will simply be a small group of people who talk funny. Clarify for those of us who don't know what it is!
Some nice light reading.