B/C Back Course
BARO Barometric
BAT Battery
BCL Battery Charge Limiter
BCDS Bite Centralized Data System
BCU Backup Control Unit
BDDV Brake Dual Distribution Valve
BITE Built-In Test Equipment
BIU BITE Interface Unit
BFE Buyer Furnished Equipment
BFO Beat Frequency Oscillator
BMC Bleed Monitoring Computer
BNR Binary
BRG Bearing
BRK Brake
BRT Bright
BSCU Braking Steering Control Unit
BTC Bus Tie Contactor
BTL Bottle
BUS Busbar
C/B Circuit Breaker
CB Circuit Breaker
C/L Checklist
CL Checklist
CAB Cabin
CAPT Captain, Capture
CAS Calibrated Airspeed
CAT Category
CBMS Circuit Breaker Monitoring System
CCD Cursor Control Device
CDL Configuration Deviation List
CDLS Cockpit Door Locking System
CDSS Cockpit Door Surveillance System
CDU Control Display Unit
CF Cost of Fuel
CFDIU Centralized Fault Display Interface Unit
CFDS Centralized Fault Display System
CG Center of Gravity
CHAN Channel
CHG Change
CHK Check
CI Cost Index
CIDS Cabin Intercommunication Data System
CKPT Cockpit
CLB Climb
CLR Clear
CLSD Closed
CM1(2) Crewmember 1 (left seat) or 2 (right seat)
CM1 Crewmember 1 (left seat)
CM2 Crewmember 2 (right seat)
CMPTR Computer
CMS Constant Mach Segment
CMS Centralized Maintenance System
CNSU Cabin Network Server Unit
CO Company
CO RTE Company Route
COND Conditioning
CONF Configuration
CONT Continuous
CPC Cabin Pressure Controller
CPCU Cabin Pressure Controller Unit
CPDLC Controller-Pilot Data Link Communication
CRC Continuous Repetitive Chime
CRG Cargo
CRS Course
CRT Cathode Ray Tube
CRZ Cruise
CSAS Conditioned Service Air System
CSCU Cargo Smoke Control Unit
CSD Constant Speed Drive
CSM/G Constant Speed Motor/Generator
CSTR Constraint
CT Cost of Time
CTL Control
CTL PNL Control Panel
CTR Center
CVR Cockpit Voice Recorder
DA Drift Angle
DAC Digital to Analog Converter
DAR Digital AIDS Recorder
DC Direct Current
DCDU Datalink Control and Display Unit
DCL Digital Cabin Logbook
DDRMI Digital Distance and Radio Magnetic Indicator
DECEL Deceleration
DES Descent
DEST Destination
DET Detection, Detector
DFA Delayed Flap Approach
DFDR Digital Flight Data Recorder
DH Decision Height
DIR Direction
DIR TO Direct To
DISC Disconnect
DISCH Discharge
DIST Distance
DITS Digital Information Transfer System
DIV Diverter
DMC Display Management Computer