Decoder

DECODER- The device used to decipher signals received from ATCRBS transponders to effect their display as select codes.
(See CODES.)
(See RADAR.) ...

ARINC, inventors of ACARS
SITA, find the latest of ACARS data from SITA
acarsd, free ACARS decoder software for Linux/Windows
v - d - e ...

See also: Altitude, Report, Mode, Direct, Air traffic