This excerpt taken from the PBI DEF 14A filed Mar 26, 2009.
A majority of the outstanding shares entitled to vote, present in person or represented by proxy, constitutes a quorum. If you grant your proxy by Internet, telephone or proxy card, you will be considered part of the quorum. Abstentions, broker non-votes and votes withheld from director nominees are included in the count to determine a quorum. If a quorum is present, director candidates receiving a majority of votes cast will be elected. Proposal 2 will be approved if a quorum is present and a majority of the votes cast by the stockholders are voted in favor of the proposal.