|  | Type in a command, or "ls dictionary" to search all commands for "dictionary", etc. | 
To retrieve tracking information for a United States Postal Service Tracking number
Example: usps 1234 5678 9012 3456 7890 12
Example: usps 1234567890123456789012
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Old implementation:
http://trkcnfrm1.smi.usps.com/PTSInternetWeb/InterLabelInquiry.do?origTrackNum=%s