What does MK stand for?

Air Mauritius - ICAO designator (AD)

Macedonia - GeoNet country code (GEON)

Macedonia - Internet country code

Machinery Technician - Military (DOMA)

Maerkischer Kreis - German license plate city code

Magic Kingdom - Disney (DIS)

Make - Telegraphy (PCTE)

Malawi Kwacha - Monetary unit

Manual Clock - Computer science (MDG)

Mariana Islands - NCIC American territory possession code (NCIC)

Mark - Ammunition (NATG)

Markka - Monetary unit - Finland (GPO)

Marschkolonne - March Column - German military - World War II

Mask - Computer science

Master Key - Locks (ADA)

Mebyon Kernow - Sons of Cornwall - National liberation party - Political party

Megakaryocyte (DMAA)

Member of Knesset (BJA)

Menaquinone - Vitamin K - Also, MQ - Biochemistry

Merck & Co., Inc. - Research code symbol

Metarrithmistikon Komma - Reformist Party - Greece - Political party (PPE)

Microphone (MDG)

Middle Kingdom - Egyptology (ROG)

Milton Keynes - Russian city

Miscellaneous Kits - JETDS nomenclature - Military (CET)

Mit Kappe - With Cap - German military - World War II

Mit Kern - With Core - German military - World War II

Modification Kit (AAG)

Mo'ed Katan (BJA)

Monk

Monkey Kidney

Mon-Khmer - Linguistics (IEL)

More-Kraepelin - Disease - Medicine (DB)

Morgan Keenan - System - Astronomy

Morrison Knudsen - NYSE symbol

Morrison Knudsen Corp. (SAUO)

Morse Key (DEN)

Mounier-Kuhn - Syndrome - Medicine (DB)

Multiple Kill - Aerospace

Myokinase (DMAA)

Northern Mariana Islands - NCIC American territory possession code (NCIC)

Mark (WDMC)

Muscat and Oman - Oman - MARC country of publication code - Library of Congress (LCCP)

Mark - New Testament book