Elections in the US are almost always plural, in every sense. The elections of 2006 are a good example: all the states held elections simultaneously, on November 7, and in each state considerable numbers of elective offices were at stake, and in many, the people were also called upon to decide legislative and constitutional questions submitted to their consideration by referenda and initiatives.
The mid-term elections of 2006 in California provide a good example. In California, the following, among other positions, were up for election:
In addition, Californians were called upon to decide on a number of "ballot measures", i.e., referenda and initiatives, including one that would have levied a tax on petroleum companies in order to raise money to study alternative energy options, and another
In order for voters to make informed decisions, the state mails information (lists of candidates and measures, succinct position statements) to voters before the election in booklet form.
Booklet Front Cover
The booklet includes instructions on how to obtain voting materials in several languages and, in Presidential years, the various "tickets", i.e., candidates for the Presidency and the Vice-Presidency supported by the various parties. 
lists of candidates for various other offices 
and brief descriptions of the ballot measures to be decided. 
Each possible choice has a number assigned to it; when the voter goes to the polling place, s/he votes by touching the number of the candidate s/he has chosen on a computer screen. Computerized voting, while it facilitates counting votes at the end of the election day, has also been subject to various technical problems.
Citizens who are not personally present on election day may vote by correspondence: in California (and many other states) the state provides a computer card, and the "absentee voter" indicates his / her choices by marking the relevant ovals on the card. 