(US, education) kindergarten through twelfth grade.

(computing) A space-partitioning data structure for organizing points in a k-dimensional space, used in search algorithms etc.

plural of k-d tree

plural of 401(k)

(algebraic geometry) K-theory studied from the point of view of algebra.

(video games) Kill-to-death ratio.

plural of K/D ratio

Alternative form of MLK

K. pneumoniae carbapenemase

(Internet slang) Coffee through nose to keyboard: suggesting that the user is laughing hard while reading a posted message.