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PERIPRO-401 - PS/2-USB Adapter for Keyboard and Mouse – Perixx USA
PC Keyboard Adapter , plug a USB Keyboard or mouse into a PS/2 port on the PC | eBay
Amazon.com: StarTech.com 6 ft PS/2 Keyboard or Mouse Extension Cable - M/F - Keyboard/Mouse Cable - PS/2 (M) to PS/2 (F) - 6 ft - KXT102, Beige : Electronics
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USB to PS/2 Adapter - Keyboard and Mouse - USB Adapters (USB 2.0) | StarTech.com
Din-5 Female to Mini-Din 6-Pin Male AT to PS/2 Keyboard Adapter w/6-inch Cable | eBay
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