Snapshots of the Evolution of the Computer Mouse
As illustrated by X-rays, these snapshots depict how the design of the computer mouse has evolved from wired electro-mechanical trackballs to a wireless optical/laser tracking mechanism. From left to right: Apple Desktop Bus Mouse II M2706, Dell Optical Laser USB Mouse 01KHD8, and Microsoft Wireless Nano Transceiver Mobile Mouse 1000. Imaged with the X-rays of a Nikon's XTH225-ST computed tomography system.
—Herminso Villarraga-Gómez Nikon Metrology, Inc.