LTSS

LTSS can mean:
 * Lutheran Theological Southern Seminary
 * Livermore Time Sharing System
 * Long-Term Support and Service (or Long-Term Services and Support)
 * in medical language (also long-term care), concerning people with disabilities
 * in data-processing language, it means extended support of software (usually enterprise software)
 * Looney Tunes Super Stars, a series of Looney Tunes DVDs
 * Lord Tweedsmuir Secondary School, a high school near Vancouver, British Columbia

LTSs is also sometimes used as the plural of LTS, which can mean:
 * Large technical system
 * Labelled transition system