What does the abreviation "kt" stands for here?

Answer 1

Look here: https://kotlinlang.org
It's a programming language like Java and Scala.

Answer 2

D B thanks (-:

Answer 3

too much possibilities(?)
i've seen it in a form of a tag, like it's a programming lang or something (py for python, cpp for c++ etc).

Answer 4

Kotlin (language)

Answer 5

???
what's that? what is it used for? never heard of it.