Low-level programming, assembly language.

Learning a new language postnatally.

"English as a Second Language" is the twenty-fourth and penultimate episode of the first season of the American comedy television series Community.

English as a second or foreign language refers to the use of English by individuals whose native language is different, commonly among students learning to speak and write English.

Teaching English as a second or foreign language and teaching English to speakers of other languages are terms that refer to teaching English to students whose first language is not English.