ABREVIERI - LITERA S

SEG - Supplementum Epigraphicum Graecum

SI – Sistemul International de Unitati / Le Système International

SLA - Asociaţia Bibliotecilor Specializate

SOI- Southern Oscillation Index ( Indexul Oscilatiei Sudice)
SPOT - Systeme Probatoire d’Observation de la Terre (satellite)
SST - Sea Surface Temperature ( Temperatura apei la  suprafata marii)
SSTA – Sea Surface Temperature Anomaly ( Anomalia temperaturii Apei la suprafata marii)

S.U.A. - Statele Unite ale Americii (USA – United States of America)

SWIFT - Society for Worldwide Interbank Financial Telecommunication