If you have a computer such as a laptop with only one PS/2 port, you may want to share the port so you can connect both a mouse and a keyboard at the same time. You can do this with a PS/2 splitter. Note, however, that not all PS/2 ports are designed to be split – most PS/2 ports can only be used for either a mouse or a keyboard. PS/2 male to twin PS/2 female.