SIS

from WordNet (r) 3.0 (2006)

sis
    n 1: a female person who has the same parents as another person;
         "my sister married a musician" [syn: {sister}, {sis}] [ant:
         {blood brother}, {brother}]

from The Collaborative International Dictionary of English v.0.48

Sis \Sis\, n.
   A colloquial abbreviation of {Sister}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Sis \Sis\, n.
   Six. See {Sise}. [Obs.] --Chaucer.
   [1913 Webster] Sisal grass

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

SIS
       Software Information Services

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

SIS
       Stellen-Informations-Service (WWW)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

SIS
       Strategic Information System

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

SIS
       Schengen Information System (police, Europe)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

SIS
       Silicon Integrated Systems [corp.] (manufacturer, Taiwan)