(radio) A modification of amplitude modulation that modulates the output signal on a single sideband only, as opposed to both sidebands.

(UK) A single yellow line painted at the side of a road to show that parking is permitted only at specified times.

(roofing) Roofing membranes that are field applied using just one layer of membrane material (either homogeneous or composite rather than multiple layers.

(roofing) A roof system in which the principal roof covering is a single layer of flexible membrane often thermoset or thermoplastic.

The vulgar hand gesture in which the middle finger is extended; the bird.

plural of single angle quote

(typography, uncommon) An angle quote which appears as a single symbol at the beginning or end of a sentence.

plural of single-page application

(electronics) A communication signaling technique that transfers data on either the rising edge or the falling edge of the clock signal.

plural of single pane of glass