What Does MCC Stand For in Coding Books?


The acronym MCC is used in coding systems in a variety of sectors. The acronym is common in the telecoms, technology and inventory control industries. It is also used in government, the military, the credit card industry and preventive maintenance planning.

Telecommunications and Programming

In computer programming, particularly in aeronautics, MCC stands for Mission Critical Code. In this context, MCC identifies blocks of computer code that, if altered, can endanger the mission.

The International Telecommunication Union uses MCC as shorthand for Mobile Country Code, the three-digit code assigned to each country in the ITU E.212 "Land Mobile Numbering Plan" for wireless telephone networks.

Manchester code is a line code used in digital data transmission, particularly over Ethernet. MCC refers to a Manchester Code Converter: a software translation device that translates NRZ (non-return to zero) code into Manchester code and vice versa.

MCC is also used for Multilevel Co-set Code, a 3-D coordinate designation system used in digital telecommunications, physics and mathematics.


In the inventory management system used by the U.S. Army, MCC stands for Materiel Category Code, which is also referred to as MCS. Either acronym refers to a five-digit alphanumeric code officially known as the Materiel Category Structure Code.

In the U.S. Navy, the Material Control Code is a letter assigned by an inventory manager to an inventory control designation. The MCC separates items into groupings by use (slow, medium or fast movers), field activities or special control and/or reporting requirements.

The U.S. Marine Corps uses MCC as shorthand for its Monitoring Command Code, sometimes referred to as Marine Command Code. All Marine bases are designated by three alphanumeric code sets, a Monitoring (or Marine) Command Code, a Reporting Unit Code (RUC) and a Port Management Control Center Code (PMCCC).


The Municipal Code Corporation (MCC) of Tallahassee, Florida, maintains a kind of Dewey decimal system for codification, recodification and publication of municipal legislation.

The database system used by the State of Minnesota Division of Administration Fleet and Surplus Services features Maintenance Class Code or MCC designation that is assigned to state vehicles on the basis of the frequency of maintenance requirements.

The Major Category Code used by the U.S. Department of Health and Human Services divides grant recipients into major categories as part of its Tracking Accountability in Government Grants System. Category designations are the known as the recipient’s MCC.


In preventive maintenance planning, a Maintenance Criticality Code is used to identify task priorities.

In the credit card industry a client merchant is assigned an MCC (Merchant Category Code) number on the basis of the industry or line of business in which the merchant is engaged.

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