Answer: Xerox 8010
Although keyboard has been with us since some of the earliest days of computer age, the mouse, as usual input devices, took significantly longer time to send bundled computers – even less anywhere. Early computers had mice and mouse-like input devices, but they were only aftermarket extensions and were not sent with the computer. The German Telefunken computer is an example of an early computer that had a mouse integrated with the system, but was an accessory and not a peripheral.
The earliest computer sent with a mouse as part of the system was the Xerox 8010 Star. Released in 1981, the system came with a two-button serial button. The mouse was light, sported an optical sensor instead of a roller ball, and it did not need a mouse pad, just like modern infrared / laser mice.
The Xerox 8010 Star was not intended to be a stand-alone machine, but was part of a workstation set-up built around the Xerox Personal Office System. It was unreasonably expensive for most offices to implement and as a result, the Star system was a commercial failure. Although it was a commercial failure, it was very influential in the industry because it had features like a GUI, integrated Ethernet, WYSIWYG editing, and network-based services such as remote directory and printing.
In addition to greatly affecting the industry, many of the people who worked with the Xerox Star project continued their work with Microsoft and Apple and took an intimate knowledge of the project and a desire to further develop the patterns they had begun to work on on Xerox.
Image courtesy of Xerox.