| Landfilling | (Environmental Engineering) The placement of wastes into the land under controlled conditions to minimize their migration or effect on the surrounding environment. |
| Ligand | (Environmental Engineering) The ion or molecule which surrounds or complexes with the central atom or ion. |
| Limnology | (Environmental Engineering) The study of freshwater ecosystems. |
| Levels of abstraction - | (Software Engineering) the degree of detail with which some representation of the software is presented |
| Line-of-code metrics - | (Software Engineering) measures of quality or productivity that are normalized using lines of code produced |
| Load testing - | (Software Engineering) a testing task that determines how software (often a WebApp) will respond to various loading conditions |
| LOC - | (Software Engineering) lines of code |
| Loop testing - | (Software Engineering) a white box testing technique that exercises program loops |
| L | ข้อต่อที่หักมุมรูปตัวแอล |
| laboratory, lab | ห้องทดลองทางวิทยาศาสตร์ |