list of widely used ABAP classes

Hello dear forum gurus.

Im trying to find information about the classes that can handle common tasks, ie. I've found classes for ALV, for FRONTEND, etc..

I'm wondering if there is any place (similar to the java class library) where I can find all these classes, or can someone tell me wich are the most used classes (or useful).

Best regards from mexico 😉

Edited by: Thomas Zloch on May 10, 2011 5:34 PM - subject adjusted by moderator