Abstract: A foot actuated computer mouse adaptor for operating a conventional computer mouse with a computer user's foot, used individually or in conjunction with one or more modular electronic adaptors that allow simultaneous use of additional conventional computer mice to drive a single cursor or multiple cursors. The foot actuated computer mouse adaptor allows a computer user to move and actuate the buttons of a conventional computer mouse via movement of one of the user's feet on any substantially flat surface. Simultaneous actuation of two or more conventional computer mice is achieved with an electronic modular adaptor that accepts input from each individual mouse and combines the two inputs to produce a single output. This single output can then be plugged directly into a computer, or into another modular adaptor, thereby allowing the simultaneous use of an unlimited number of conventional computer mice.