Newbie question - good sources of terms definitions and tutorials

Hi all: Sorry for the broad questions.   

I am a brand new interested user of iSeries machines and C programming. 

I'm reading through C runtime library and programming manuals, but I'm
missing context because of terms that are iSeries-centric.  I've been able
to figure what PASE is, for example, but there's an easy to find book about
it on the IBM bookshelf. Many terms that look commonplace but mean something
specific in the iSeries context appear.   What's behind the words?  

1)  Cany anyone direct me to decent glossaries of iSeries terms?   I can
search archives, and hobble around in the IBM bookshelves, but a link to a
good URL glossary or two would save lots of time. 
2) online tutorials for iSeries?   do any exist? 

Thanks for the pointers. 

Dave McLellan --Consulting Software Engineer - SPEA Engineering
EMC Corporation
228 South St. Mail Stop: 228 LL/AA-24
Hopkinton, MA 01748  USA
+1-508-249-1257 F: +1-508-497-8030  mclellan_dave@xxxxxxx