I collect MTG cards and after hoarding a huge collection I'm trying to get it all organized now from this mess.
I've found an xls file that has almost all of the cards on it but it's not updated for the latest 2-3 sets. I can find an input all the information required for those but I don't know where to find the info for this "CIN" column - it looks like it is just the abbreviation of the set name and then the card number within the set? How do I know what the abbreviation is and is there anywhere I can just look up this information?