Under the Whyte notation system, a steam locomotive that has four coupled leading wheels, ten coupled driving wheels, and one pair of trailing wheels.

Under the Whyte notation system, a steam locomotive that has two leading wheels, five pairs of coupled driving wheels, and two trailing wheels.

(graphical user interface) A graphical user interface designed for televisions and thus requiring much larger visual elements than those used on computers and smartphones, as well as the ability to be operated by a simple remote control.

plural of 10-foot user interface

(dated, informal, military, World War II) The German Messerschmitt 109 fighter aircraft.

(athletics) A long-distance running race over 10 000 metres.

plural of 1099

(US, taxation) The main form for US individual income tax filing.

(US, taxation) A form reporting one's nonemployment income from a given source for a year.

plural of 1040