What does MKA stand for?

Machine Knife Association (EA)

Makaopuhi - Hawaii - Seismograph station code, US Geological Survey (SEIS)

Marine-Kuestenartillerie - Naval Coast Artillery - German military - World War II

Master Kennel Association - Commercial firm (EA)

Mbre - Language code (ETLW)

McTish, Kunkel and Associates - Commercial firm

Metrika Systems - AMEX symbol (SPSG)

Mikkenger Arms - NCIC firearms make code (NCIC)

Miller, SD - Location identifier - FAA (FAAL)

MK Aircargo - British - ICAO designator (FAAC)

Moses Ark Boat Works Inc., Solon, IA - Manufacturer code for watercraft hull identification number (USCG)