L2

noun5

1. •
   A second language (a language being learned, as opposed to a mother tongue).

   • That is, for almost all late second language (L2) learners, the phonetic realization of phonological structures in the L2 is markedly different from native-language patterns. — 2008
2. •
   The second-level cache of a processor, farther away from the processor than the first level cache.

   • In typical Intel chips L2 bandwidth is half of L1 bandwidth.
3. •
   The data link layer in the seven layer OSI network model.
4. •
   Short for second level in various contexts
5. •
   Abbreviation of Lagrange point 2, located beyond the smaller object on a line passing through the centers of the smaller and larger objects.