OTL

OTL may stand for:

Oradea Transport Local
Over-the-line, a variant of softball played mostly in Southern California
Over time limit
Output transformerless, a vacuum tube amplifier topology
Outside the Lines, an American sports television series focusing on off-the-field stories
Oracle Template Library
An emoticon representing a kneeling or bowing person
Overtime loss in ice hockey
Otl Aicher, a graphic designer and typographer
South Airlines, by ICAO airline code
Ottawa Tool Library
On the Loose, an outing club for the Claremont Colleges in Claremont, California, United States