It contains all book buyers and above. No OCA names, that I am aware of. Although one could do this, if they had the name and address details. Even with book buyers, if they don't give their details then they are entered as No Name, or something else applicable. Every sale is entered on the computer system. It is a very time consuming and annoying way to sell a book. Name, address, telephone, email address, name of book, price, promotional code (never used this, but its there), where they were born (I kid you not), their home org. Apparently more fields keep getting added in an attempt to weed out duplicate names from the world wide database.