Well, technically we haven't been known as United Parcel Service for years. Just like Federal Express changed their brand's name to FedEx we've been known as UPS for quite some time. Not sure if they ever made it official because you can still see the old name here and there..
..and by the way, we don't really work for UPS but rather for a subsidiary of UPS known as UPS Airlines. (Look at your ID just above the word CREW) LOL! Clear as mud? 
Here are some other subsidiaries:
The UPS Store
UPS Supply Chain Solutions
UPS Capital
UPS Airlines
UPS Express Critical
UPS Freight
UPS Logistics
UPS Mail Innovations
UPS Professional Solutions
UPS i-parcel
_____
From the Online Application:
"
UPS operates one of the world's largest airlines serving over 220 countries and territories worldwide. UPS delivers 15.8 million packages and documents daily. The company's extensive air network includes international air hubs in Cologne/Bonn, Germany; Hamilton, Ontario in Canada; and in the Asia Pacific region Shanghai, Shenzhen, and Hong Kong; Within the U.S. Miami, FL serving Latin America and the largest air hub UPS Worldport in Louisville, Kentucky, also the
headquarters for UPS Airlines. Crew domiciles include Louisville; Ontario, CA; Miami, FL; and Anchorage AK.