Why PCs Still Have PS/2 Mouse and Keyboard Ports - YouTube
Amazon.com: PS2 to USB Female,PS/2 Male Converter Changer Adapter for Keyboard Mouse 2pcs by Oxusbor(Notice:Can't Match All Motherboard,Have Matching Problem) : Electronics
StarTech.com Replacement USB Mouse to PS2 Adapter FM Connect a USB Mouse to a computer through a PS2 port usb to ps2 adapter usb mouse to ps2 adapter - Office Depot
PS2 Keyboard Adapter Module PS/2 Connector for Arduino