I hate to sound like such a novice but I searched the net and can't seem to find a clear expanation of all the different service classes... besides F (first) C (Business), Y (economy) I dont know what other ones there are and what they mean. I hope this is an okay place to ask this. Thanks in advance for the patience :-)

Classes besides F, C, and Y are usually dependent on the airplane and simply refer to fare classes within each cabin. Each airline has its own set of fare classes. For example, if you were to run a search at itn.net under expert mode it would show you how many seats at each fare class are available. Not always, however, are you able to get the lowest fare class, but the lower the class goes, the more restrictive it is. There may be one or two fare classes of F or C class, but many airlines have 10 or so fare classes of Y class to satisfy every possible restriction possibility: upgrade, changes, stopovers, standby, advance-purchase requirement, refundability, travel dates, blackout dates, minimum/maximum stay, etc. Hope this answers your question. If you are wondering about a specific airline, you can ask in that airlines forum about different fare classes and an expert of that airline can tell you everything about it. (keep in mind, though, that fare classes also revolve around city-pairs and availability, not to mention travel dates)

ITYT | Library : Airlines : Continental Airlines (CO) : Fare Classes and Codes

Thank you both for the clarification :-)