What is ASP and resources....

Hello people.

I have been out of the loop for a while.
I can't even remember C++ well.
I have been working for a company which offers engineering services
(I studied Computer Sciences) and have not really applied or practiced my programming skills.
Now, I will try to find another job and it seems that everyone asks about ASP, .NET, etc.

What is ASP?
What can you do with it?
Is this in the .NET Package? (Explain . NET if you can also.)
Should I learn ASP and C#?
and most importantly, can you recommend good books
that are introductions to these but also get more difficult as you go on
(such as textbooks)?

I know these are a bunch of questions but if I'm going to start programming again, I need to get up to date.

Also, if you can, can you reccomend books for MySQL and PHP good for beginners and intermediate users?

Thanks again.