I don’t know what that means.
Institute of Business Travel Management
Or...
Acronym Definition
IBTM Institute of Business Travel Management
*IBTM In Before the Move (internet forums)
IBTM International Business and Technology Management (Lappeenranta University of Technology; Finland)
IBTM In Band Transport Multiplex
http://acronyms.thefreedictionary.com/IBTM
See post 13