The "U" that precedes the number stands for Update on cards from the Fleer Update set. For example U25 would be the 25th card of the Update set. Traded or Update Sets are a set of cards, usually factory packaged, that features players who switched teams during the season, as well as those who made their debuts. Topps, who started this trend in 1981, is most well known for traded sets. Other companies also produce traded sets, although they refer to them by different names such as "Update" (Fleer) and "Rookie/Traded" (Score) sets.
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The suffix/affix of -tion means the process of. This is shown in production: the process of producing.
It's the ration card number.
It means before.
AGAINST
It means one.
If you mean what cards do baseball card collectors collect,than all kinds of baseball cards. If you mean What is a baseball card collector, than one who collects baseball cards.
it means your credit or debit card number on the front of your card. there is a 16 digit number at the middle of your card.and thats your card number.
nothing
The 16 digit account number printed or embossed on the card.
AGAINST