6689
Also , similar competition has helped in manufacturing , energy , transportation , and parcel postal ( UPS , FedEx vs. USPS ) sectors of government that have been socialized and later opened up to free market competition .
 UPS, FedEx, USPS
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 UPS, FedEx, USPS