Gregory's ServerAnd doing Add Change Delete with Hollerith cards.
Which is where the term Record came from.
For, in the olden daze, you would load your program with cards, and then feed it your database (not joking) that was stored on cards, and then the program could punch new cards with the updated database.
You did not want to drop a stack of cards.
Which is why they would have a sequence number, so you could manually sort the stack.
It is genius that the cards are both human readable and machine readable.