201401
Unusual units of measure are sometimes used by scientist s , especially physicist s and mathematician s , and other technician s , engineer s and computer programmer s , either humorously or for real convenience when dealing with objects in the real world whose quantities in more conventional units may be awkward to use .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None