LTR
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png)
Look up LTR in Wiktionary, the free dictionary.
LTR or ltr may refer to:
Science and technology
- Learning to Rank, an algorithm used in the construction of ranking models for information retrieval systems
- Litre (or liter), a metric unit of volume
- Load task register, a computing instruction
- Logic Trunked Radio, a computer-controlled radio system
- Long terminal repeat, a DNA sequence found in retroviruses and retrotransposons
Other uses
- Left to right, a group of writing systems
- Letter (paper size)
- Model 700P Light Tactical Rifle, a rifle manufactured by Remington Arms
- London Turkish Radio
- Long-term relationship
See also
- "Left to Right", a short story by Isaac Asimov
- Left-to-right mark, a typesetting control character.