Definitions containing the term t number

What does t number mean?

EIN	Employee Identification Number Miscellaneous » Unclassified
APN	Assessor Parcel Number Governmental » Environmental
SLN	Schedule Line Number Governmental » US Government
ACRN	Accounting Classification Reference Number Governmental » US Government
PTIN	Preparer Tax Identification Number Governmental » US Government
PTIN	Preparer Tax Identification Number Business » International Business
PTIN	Preparer Tax Identification Number Business » General
PTIN	Preparer Tax Identification Number Business » Accounting
OAN	Owner Applied Number Business » General
OAN	Owner Applied Number Governmental » US Government
ACPN	Adjusted Composite Pupil Number Community » Educational
OSN	Operator Security Number Computing » Security
SN	Serial Number Business » General
ESN	Electronic Serial Number Business » General
CPN	Calling Party Number Computing » Telecom
OCN	Operating Company Number Computing » Telecom
SCN	System Change Number Governmental » Military
PNC	Plate Number Coil Miscellaneous » Unclassified
UIN	User Identification Number Computing » Security
BCIN	Building Code Identification Number Academic & Science » Architecture
TURN	Traders Unique Reference Number Business » General
DBN	Dial-Back Number Computing » Telecom
QFU	What is the magnetic direction (or number) of the runway to be used? Governmental » Transportation
STAN	Supply of Telstra Account Number Computing » Telecom
WGNT	Wrinkly Guy Number Two Miscellaneous » Funnies

T number(n.): one of a series of calibrations of the lens openings of a camera according to the intensity of transmitted light.