Survey & Ballot Systems (SBS) oversaw the Minnesota Nurses Association's (MNA) contract vote that took place on May 19, 2010. Over 9,000 MNA members participated in the vote that rejected a proposed contract and authorized the largest nursing strike in U.S. history. MNA officials cited SBS's election management experience and commitment to customer service in selecting them to manage the vote. SBS has provided election services to associations worldwide since 1990.