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Smithsonian National Postal Museum

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TEMPORARILY CLOSED
Open every day (except December 25)
10:00 am to 5:30 pm

Admission is always free!

2 Massachusetts Ave., N.E.
Washington, DC 20002

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Systems at Work

Home
Exhibitions
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Systems at Work
Decode the Barcode

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Decode the Barcode

Envelope with barcode

Envelopes have secret codes that machines can read. Your job is to decode the barcode!

Follow the hints »

Systems at Work

The Exhibition
Catalysts of Change
- Decode the Barcode
Resources
- Objects in Exhibition
- Curriculum
About the Exhibition
Exhibition Outline

‹ Catalysts of Change up Hint #1 ›

Smithsonian National Postal Museum

TEMPORARILY CLOSED
Open every day (except December 25)
10:00 am to 5:30 pm

Admission is always free!

2 Massachusetts Ave., N.E.
Washington, DC 20002

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Owney, the Railway Mail Service Mascot

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