What are the main differences between a serger and an overlocker?

A serger and an overlocker are essentially the same type of machine used for sewing, but the main difference lies in the terminology used in different regions. In the United States, the machine is typically referred to as a serger, while in other parts of the world, especially in the UK and Australia, it is called an overlocker. Both machines are used for finishing edges, creating seams, and trimming fabric simultaneously, but the terms used to describe them vary based on location.