LTI can refer to:
* ''
LTI – Lingua Tertii Imperii'', a book by Victor Klemperer
*
Language Technologies Institute, a division of Carnegie Mellon University
*
Linear time-invariant system, an engineering theory that investigates the response of a linear, time-invariant system to an arbitrary input signal
* ''
Licensed to Ill'', the 1986 debut album by the Beastie Boys
* Lost Time Incident or industrial injury or
Occupational injury
*
Learning Tools Interoperability
Learning Tools Interoperability (LTI) is an education technology specification developed by the IMS Global Learning Consortium. It specifies a method for a learning system to invoke and to communicate with external systems. In the current version o ...
* Louisiana Training Institute-East Baton Rouge, later known as the
Jetson Center for Youth (JCY), a juvenile prison in Louisiana
Companies
*
London Taxis International
*
Larsen & Toubro Infotech
Biology and medicine
* Lymphoid tissue-inducer cell, see
innate lymphoid cells
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