This list shows an overview of postal code notation schemes for all countries that have postal/ZIP code systems:

MARC Code List for Languages prepared by the Library of Congress Network Development and MARC Standards Office

This is a list of country calling codes defined by ITU-T recommendation E.164.

Enter keyword or 2-6 digit code ... Introduction. The North American Industry Classification System (NAICS) is the standard ...

Cpt code list and Cpt code list online - CPT Code list at CodeCorrect helps increase rightful revenue by making it easier to capture correct reimbursement for services rendered.