Tad Suiter, Assistant Curator, Systems at WorkFrom wedding invitations to legal documents to twenty dollars in a card from grandma, we all depend on the postal service to get our mail where it is going, and to do so quickly, affordably, and reliably.You drop a letter in a blue box. Days later, it’s at the address you wrote on the envelope-- clear across the country for less than 50-cents. But how does it work? How does the mail get from point A to point B?This is one of the most commonly-asked questions by visitors. The National Postal Museum is proud to present Systems at Work, a new permanent exhibit dedicated to answering that very question. The exhibit explores the processing technology of the postal system and how those systems have evolved over the last two hundred years.