Not too many years after that (in the 80's ??) there was a programer at the bank who did just that. He took the excess interest calculations beyond the 'thousands', dropped the fractional money into an account, & had more than $5,000,000 when they caught him.
Now then... picture a hungry grocery store manager who places instructions into a cash register to "1) accumulate each item for a grand total & store it in the accumulator, then 2) count the items entered, then 3) if the count is 100+ items add $10 to the accumulator BEFORE printing the total."
It would work. When would he get caught? When someone takes the receipt and physically adds the numbers on an adding machine. Who does that with a longggggg tape?? And, if they found a $10 difference, they would chalk it up to an entry error on their part. Better yet, if they did a second tape & came out with the same result... then brought the problem to the store manager... the manager would shirk his shoulders in disbelief. He'd pay them the $10 back and then assure the customer that a quirk had happened.. soon to be looked into.
Given volume, a chunk of free money would come to the store. It adds up. The manager would win blue ribbons for profitability. Success for him is just a program instruction away...
It can happen just about anywhere. Even in plain view.
