The best replacement for usb keyboard is ps2.

The best alternatives to usb keyboard are rated as following:
★★★★★  ps2
★★  ps2 keyboard
★  midi keyboard
★  bluetooth keyboard
  ps 2
  ps\/2

Your alternative for usb keyboard is not listed? Suggest!
Speaking about usb keyboard, one probably shouldn't forget about bios.

Other search terms related to usb keyboard and their ratings are:
★★★★★ bios
You have in mind a companion for usb keyboard and it is not yet here? Propose!



Google Trends

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usb keyboard
ps2
ps2 keyboard