Monitor

For what it's worth, this was triggered by a reference to an Oracle package called dbms_monitor.

The GE Monitor Top refrigerator was one of the first mass market refrigerators, sold from 1925 to 1936. In The Apartment, Jack Lemmon's kitchen has one of these - it would have been twenty or thirty years old. Its presence probably indicated a frugal but practical lifestyle. They are still renowned for their ability to keep running, nearly 90 years after they were first released.

It received its distinctive name from the round heat exchanger on its top, which resembled the turret on the USS Monitor. That was the first Union ironclad over 60 years before, when it kept the Merrimack CSS Virginia from a resounding Confederate victory at the 1862 Battle of Hampton Roads. (Their specific duel was a draw, neither warship able to harm the other.)  Successful as it was, the same basic shape - a low flat body with a round turret containing heavy guns - were used for a type of warship, called Monitors after that first one.

The effects of Crisis times run deep indeed, for so many people to associate a common household appliance with a warship based on its shape, distinctive though it is.