Early autograph collectors focused on signature only, often discarding the document from which it was cut. Today’s collectors know that the context of the letter or document can significantly increase the autograph’s value.
Standard abbreviations denoting type and size include:
ADS Autograph Document Signed
ALS Autograph Letter Signed
A P Album Page Signed
A Q S Autograph Quotation Signed
C S Card Signed
DS Document Signed
FDC First Day Cover
LS Letter Signed
PS Photograph Signed
TLS Typed Letter Signed
References: Mark Allen Baker, “The Standard Guide to Collecting Autographs,” Krause Publications, 1999; Kevin Martin, “Signautres of the Stars: A Guide for Autograph Collectors, Dealers, and Enthusiasts,” Antique Trader Books, 1998; George Sanders, Helen Sanders, and Ralph Roberts, “The Sanders Price Guide to Autographs,” 4th Edition, Alexander Books, 1997; George Sanders, Helen Sanders and Ralph Roberts, “The Sanders Price Guide to Sports Autographs,” 2nd Edition, Alexander Books, 1997.
— Harry L. Rinker
“Official Price Guide to Collectibles”