The name Mouse can be traced back to the terminology used by the research team of Douglas Engelbart, the inventor of the mouse, when developing mouse prototypes in the 1960s. It is said that when they choose a name, they call it a mouse because it looks like a small mouse.

However, there are several different explanations for why the name "mouse" was chosen:

Shape similarity: The shape of a mouse is somewhat similar to the body shape of a mouse, especially in early mouse designs where they had a long tail connected to a computer. This design is similar to the tail of a mouse, so it may have been named based on this similarity.

Connecting the Tail of a Computer: Early mouse designs had a tail that was used to connect to a computer, much like the tail of a mouse. Therefore, people may associate this tail with the tail of a mouse, calling it a "mouse".

Idioms in the laboratory: In Engelbart's research team, they are accustomed to using the term "mouse" to describe the devices they develop, possibly because the name sounds more vivid and memorable.

Regardless of the statement, it can be seen that the origin of the name "mouse" is related to the appearance or characteristics of rodents. This name has become a common term for mouse devices and is widely used worldwide.