One major area of pattern recognition has been the analysis of checks. The initial coding was for bank information, but now pattern recognition has migrated to ATMs. Deposit a stack of checks and the ATM tries to read the amount and generate your deposit slip. This works for checks that have normal printed amounts, but has consistently failed for check with the fancy encoding of the amount (for these the user types the correct amount given an image of the check). Even better you can deposit a stack of random bills, but the machines still only issue $20 bills (I know there are other combinations, such as only $100, or a $20 and a $5, but few options of arbitrary amounts for US banks since the money is all the same size).

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