WordNet (r) 3.0 (2006):
Rus n 1: the medieval Russian state established by Scandinavian traders in the 9th century; the capital was first in Novgorod and then in KievV.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):
RUS Rechenzentrum der Universitaet Stuttgart (org., Uni Stuttgart, Germany)