four digits
- PINAuthentication number sequence
- codeSymbolic communication system
- passcodeSecret entry sequence
- combinationJoining of multiple elements
- unlockOpen a secured closure
keypad · secure · number · entry · password · ATM · lock · numeric · sequence · digits · security · access · input · bank · phone · verification · secret · typed
numerical length
four digitssingle digit
Integer from 1-9
billions · trillions · seven figures · two digits · double digits
magnitude/scale
four digitssix figures
Income above $99,999
seven figures · pennies · pocket change · millions · billions
precision/specificity
four digitscountless
Too numerous to count
innumerable · uncountable · numberless · infinite · unquantifiable