If you make a withdrawal, many ATM machines require you to request the desired amount of money using a decimal point. Thus, if you want 200 Dollars (or Euro as the case is here or Pounds in the UK), you must enter the digit "2", followed by four zeroes, not two. (200.00 not 200)
Now, considering that the machines only dispense bills, often in denominations of 20 or higher, the inclusion of the decimal point is useless, and for some folks, confusing.
There are two reasons for this. Some of you software developers may take issue, but one reason is just plain and simple lazy or thoughtless code writing. I am amazed that the ATM code writers, or their employers, haven't noticed this and modified the code.
Now, having said the above, anyone want to identify the other reason that ATM machines often require expressing the amount to be withdrawn with two decimal places?
Al