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Sn,

symbol for the element tintin,
metallic chemical element; symbol Sn [Lat. stannum]; at. no. 50; at. wt. 118.710; m.p. 231.9681°C;; b.p. 2,270°C;; sp. gr. 5.75 (gray), 7.3 (white); valence +2 or +4. Tin exhibits allotropy; above 13.
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Sn

(chemistry)
tin

sn

(networking)
The country code for Senegal.

SN

(1) (Serial/Number) Common shorthand for serial number.

(2) (Signal/Noise) As in "s/n ratio." See signal-to-noise ratio.

(3) See shared nothing.
References in periodicals archive ?
The memoirs of Ahmad Tawfiq al-Madani, Hayat Kifah (Algiers: SNED, 1977-1981) and Muhammed Khayr al-Din, Mudhakkirat (Algiers: SNED, n.
Mammeri Khalfa, Les Nations Unies Face a la Question Algerienne, 1954-1962 (Algiers: SNED, 1969), 41-45.
Contribution a une sociologie de la decolonisation (Algiers: SNED, 1982), 58.