Irritable bowel syndrome, a disorder of the bowel

International Biogeography Society, a society for the study of biogeography

IBS, a satirical news channel on the BBC's programme Broken News

Internet Broadcasting, a web design firm focused on broadcast television

INTELSAT business service, a satellite communication standard provided by INTELSAT

Intrabeam Scattering, a collective effect arising in high-intensity particle beams

International Bible Society, a group that translates and publishes the Bible with the intent of Christian proselytization

Intercollegiate Broadcasting System - serves college/community radio stations, streaming webcasters, etc.

Institute of Broadcast Sound, a UK broadcasting professional association

International Biometric Society, an academic statistical association for mathematical and statistical methods in the biosciences

ICFAI Business School, an MBA School in India