==== Vocabulary ====
**Concepts:**

  * //enteredPin// - a PIN number that has been entered by user.
  * //correctPIN// - a PIN number that is stored on the card. 
  * //authorized// - indicates if the user has entered the correct PIN.
  * //userAccountAmount// - the amount of the free founds on the user account.
  * //cashPointAmount// - the amount of the founds that are available in a cashpoint.
  * //failedAttempts// - the number of failed attempts to authorization.
  * //requestedAction// - the operation that user want to execute.
  * //cashPointActivity// - the final operation invoked by cashpoint.

**Relations:**

  * //enteredPin// -> //authorized//
  * //correctPIN// -> //authorized//
  * //enteredPin// -> //failedAttempts//
  * //correctPIN// -> //failedAttempts//
  * //authorized// -> //cashPointActivity//
  * //userAccountAmount// -> //cashPointActivity//
  * //cashPointAmount// -> //cashPointActivity//
  * //failedAttempts// -> //cashPointActivity//
  * //requestedAction// -> //cashPointActivity//