who who /ˈhuː/

pronoun

1. () Interrogative pronoun inquiring about the identity of a person.  ( who )
   Interrogative pronoun inquiring about the identity of a person.
   
2. () Referring to any person without discrimination.  ( who )
   Referring to any person without discrimination.
   

 WHO

noun

1. A United Nations agency to coordinate international health activities and to help governments improve health services  ( W.H.O. , WHO , World Health Organization , World Health Organisation [British] )
   a United Nations agency to coordinate international health activities and to help governments improve health services