K-28 is a state highway in the U.S. state of Kansas.
The K-28 is a class of ten 3 ft 0 in (914 mm) narrow gauge 2-8-2, steam locomotives, built in 1923 by the Schenectady Locomotive Works of the American Locomotive Company for the Denver & Rio Grande Railroad.
The SCR-268 (for Signal Corps Radio no. 268) was the US Army's first radar system.
Wolfgang Amadeus Mozart's set of six sonatas for keyboard and violin, K. 26–31 were composed in early 1766 in The Hague during the Mozart family's grand tour of Europe.