The term COLLECTOR'S SUFFIX can be solved by two crossword solutions: IANA (4 letters) and ANA (3 letters). IANA is an acronym for the Internet Assigned Numbers Authority, which is a department of the Internet Corporation for Assigned Names and Numbers (ICANN). It is responsible for maintaining various databases related to the namespaces of the Internet, including the Domain Name System (DNS). ANA is an acronym for the American Numismatic Association, which is a nonprofit organization dedicated to the study and collection of coins, paper money, tokens, and other related items.