What is "sao"

Sao \Sa"o\, n. (Zo["o]l.) Any marine annelid of the genus Hyalin[ae]cia, especially H. tubicola of Europe, which inhabits a transparent movable tube resembling a quill in color and texture.

Sao ( ; Greek: Σαώ) is a prograde irregular satellite of Neptune. It was discovered by Matthew J. Holman et al. on August 14, 2002.

Sao orbits Neptune at a distance of about 22.4 million km and is about 44 kilometers in diameter (assuming an albedo of 0.04).

Sao follows an exceptionally inclined and moderately eccentric orbit illustrated on the diagram in relation to other irregular satellites of Neptune. The satellites above the horizontal axis are prograde, the satellites beneath it are retrograde. The yellow segments extend from the pericentre to the apocentre, showing the eccentricity.

The satellite is in Kozai resonance, i.e. its inclination and eccentricity are coupled (the inclination of the orbit decreases while eccentricity increases and vice versa).

Sao, or Neptune XI, like many of the outer satellites of Neptune, is named after one of the Nereids; Sao was associated with sailing and is referred to as "The rescuer" or "Safety". Before the announcement of its name on February 3, 2007 (IAUC 8802 ), Sao was known provisionally as S/2002 N 2.

The sáo (also called sáo trúc or "sow trook", pronounced ) is a small flute found in Vietnam that is traditionally thought to contain the culture and spirit of Vietnam's countryside. When played, the flutist holds the sáo transversely to the right side with his or her mouth placed at the blowing hole. The sáo is usually performed solo or in an ensemble among other instruments in orchestras of Vietnamese popular opera Chèo, Van singing genre, and Royal Small Orchestra.

SAO biscuits are a savoury cracker biscuit that was launched in Australia in 1906 by Arnott's. The term SAO was trade marked in 1904.

The origin of the name "SAO" is unclear. A widely held belief is that the name is an acronym for "Salvation Army Officer", and was named for Arthur, one of the Arnott brothers, who was indeed an officer in the Salvation Army. The Salvation Army Australia somewhat cautiously mentions this on its website, calling it "Arguably Fact" and saying "...it is understood they named it in honour of their brother Arthur Arnott, a Salvation Army Officer. In the 1993 book The Story of Arnott's Famous Biscuits, Ross Arnott states that Sao was the name of a sailing boat which his grandfather [Arnott's founder William Arnott] saw on Lake Macquarie, of which he said "That would make a good name for a biscuit."

SAOs were also one of the first biscuits to be heavily advertised in magazines and newspapers in the early part of the 1900s. In the 1960s, the famous SAO song was launched. SAOs light texture is achieved by rolling the dough into thin sheets, then carefully layering it to give distinctive bubbles and crumbs.

SAOs are often eaten as a light snack, topped with butter/margarine and Vegemite, or other ingredients.

Traditionally, Arnott's delivery vans have had number plates in the range SA 0nn in recognition of the SAO brand.