TRN
TRN serves as the IATA code for Turin’s airport and is also the ticker for Trinity Industries, a major railcar manufacturer, with occasional use for internal government notices and local news outlets.
Miscellaneous
Target Ring Number
The Robotech Network
Talk Radio Network
The Reserves Network
The Resource Network
Topic Reply Notification
Training Resource Network
Toms Robbing Numbers
Topology Representing Networks
Transaction Reference Number