Originally named the 'X–Y position indicator for a display system', there is no evidence that the computer mouse was ever called a turtle.
Engelbart applied for a patent in 1967 and received it for the wooden shell with two metal wheels in 1970, describing it in the patent application as an 'X-Y position indicator for a display system.' For marketing purposes, the inventors chose to call it a mouse because the cord that stuck out resembled a mouse's tail. The improved version of the device was first sold by the Xerox Corporation on April 27, 1981, debuting as part of a personal computer station. Other than being called a mouse, there is no record of the device having other names.