The best replacement for usb adapter is pci card.

The best alternatives to usb adapter are rated as following:
★★★★★  pci card
★★★★  pci adapter
★★★  wireless card
★★  wireless pci adapter
★★  network card
★  pc card
  wireless pci card
  lan adapter
  pci wireless
  wireless router
  pci network adapter
  wireless network card

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

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



Google Trends

Scale is based on the average worldwide traffic of usb adapter in all years. Click on graph for more.
usb adapter
pci card
pci adapter