One of the two isometric forms of propanol; a primary alcohol with the formula CH₃CH₂CH₂OH, formed naturally in small amounts during many fermentation processes and used as a solvent in the pharmaceutical industry mainly for resins and cellulose esters.

plural of 1-on-1

(computing, slang, humorous, derogatory) The computing company Microsoft.

A laplet computer.

A puzzle similar to a Rubik's Cube that can change shape due to the way it is cut.

A title added before the name of a first sergeant. / A title added before the name of a sergeant first class.

Initialism of human immunodeficiency virus 1.

Alternative spelling of grade one

(Canada, US, telephony) Of telephone numbers dialed in North America, having an additional charge assessed to the caller, part of which is returned to the owner of the number.

plural of 1/Sgt.