Definitions containing the term back-number

What does back-number mean?

S/N	Serial Number Governmental » Military
VIN	Vehicle Identification Number Community » Educational
TIN	Taxpayer Identification Number Governmental » US Government
LNP	Local Number Portability Computing » Telecom
LNP	Local Number Portability Computing » Networking
NSN	National Stock Number Miscellaneous » USPS
NSN	National Stock Number Governmental » Military
BOB	Back Of the Book Academic & Science » Universities
NAN	Not A Number Computing » Software
NAN	Not A Number Computing » Assembly
ISSN	International Standard Serial Number Miscellaneous » USPS
DCN	Document Control Number Governmental » US Government
ISSN	International Standard Serial Number Community » Media
ANI	Automatic Number Identification Computing » Telecom
ANI	Automatic Number Identification Computing » Networking
IBAN	International Bank Account Number Governmental » US Government
IBAN	International Bank Account Number Business » Accounting
IBAN	International Bank Account Number Business » International Business
BT	Back Trace Computing » Security
FEIN	Federal Employer Identification Number Business » General
WON	Number of Games Won Community » Sports
MPN	Most Probable Number Academic & Science » Physics
MPN	Most Probable Number Academic & Science » Mathematics
BRB	Be Right Back Internet » Chat
MNP	Mobile Number Portability Computing » Telecom