There is a big list of them right here on the forum:
http://www.fanmail.biz/mboard/viewtopic ... 17&t=14169

Cheers for those, I myself have had to piece together most of that stuff since joining this game - thanks for clarifying some of the more obscure ones

Common Autograph Abbreviations-
DS = Document Signed
FDC = First Day Cover (issued by the Postal Service)
HOF = Hall of Fame
I = Inscribed or personalized
IP = In Person
ISP = Inscribed Signed Photo
PP = Preprint (autograph is part of the photo... see our eBay Guide on preprints for more info)
SASE- Self Addressed Self Envelope
SIC = Signed Index Card
SP = Signed Photo
SPC = Signed Postcard
STC = Signed Trading Card
TC = Trading Card
TLS = Typed Letter Signed
TTM = Through The Mail
UACC = Universal Autograph Collector's Club
VV- Via Venue

All those info you can find searching in google But I will try to help you anytime.

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Hi I'm new to this so please be patient with me what does it mean if a address is RTS???