At work do you address a supervisor or manager by name or title, Mr. Mrs?
I work in a hospital. I address my supervisors, managers and even the president/CEO by first name. But recently I observed in a Walgreens a clerk. probably in her 50s having to address a manager in his 20s as "Mr." Pretentious crap.
Always by their first name. Sometimes by their nickname. When I was working for the Japanese the managing director got either a Mr Ohashi or Ohashi-san. Both were acceptable. (Japanese managing directors are one step up from God.)
Worse. On one occasion I stuffed things up and one of the Japanese guys came to see me. He said, "If you ever do this again I will bring a ceremonial knife into this office and watch you ritually disembowel yourself."
I think he was joking but I never put him to the test.
It really depends on the manager. I worked for a privately owned company before and he preferred that I use the title of Mr. with his last name. As a default though I usually use their first name. My exception was with my job with Enterprise. We had one branch manager and two assistants. Their names were John, John, and Juan. In that case, I used their last names to avoid confusion. Typically I'll just use their first names. More and more employers and supervisor prefer that anyway.
My boss now we use her first name and the job prior to that the boss also allowed his first name. Its usually the small and insecure with something to proove who get on the major power trips and demand to be called Mr. or Mrs.
Benedict Arnold 