When trying to find out about users, the gold standard is to watch a user in the context of the workplace. However, this isn't always possible. Who else in a company knows about the users? Suppose you are consulting company that sells computers and you needed to find out about the people who use this equipment. However, you cannot interview the users (customers) directly. Where would you turn? What departments or people would you consult? Name at least three.

What will be an ideal response?

Customer service
Technical support
Marketing/sales
Help desk
Shipping
Repairman
Receptionists