MCA

Astronomy, Natural sciences Abbreviation, Initialism Initialism of Mars-crossing asteroid.

Aeronautics, Aerospace, Aviation, Business, Engineering, Natural sciences, Physical sciences Abbreviation, Initialism Initialism of minimum crossing altitude.

A master in computer science and application.

Anatomy, Medicine, Sciences Abbreviation, Initialism Initialism of middle cerebral artery.

Abbreviation, Initialism Initialism of multiple congenital anomalies

Nautical, Transport Abbreviation, Initialism Initialism of Maritime and Coastguard Agency