Resource sites to visit for more information about USB and USB product compatibility and availability:

www.usb.org

www.allusb.com

developer.intel.com/design/usb/
and
www.apple.com/usb

• What's next? USB 2.0.

• System Specifications

Here's a quick list of the maximum transfer rates for various connections so that you can compare where USB stands:

Apple ADB port: 10kbits/s

Serial port: 115kbits/s (.115Mbits/s)

Apple serial port: 230kbits/s

Standard parallel port: 115kBYTES/s (.115MBYTES/s)

USB sub-channel: 1.5Mbit/s

Apple serial GeoPort: 2 Mbits/s

USB: 12Mbits/s ECP/EPP

Parallel port: 3MBytes/s

IDE: 3.3-16.7MBytes/s

SCSI-1: 5MBytes/s

SCSI-2 (Fast SCSI, Fast Narrow SCSI): 10MBytes/s

Fast Wide SCSI (Wide SCSI): 20MBytes/s

Ultra SCSI (SCSI-3, Fast-20, Ultra Narrow):

20MBytes/s UltraIDE: 33MBytes/s

Wide Ultra SCSI (Fast Wide 20): 40MBytes/s

Ultra2 SCSI: 40MBytes/s

IEEE-1394: 100-400Mbits/s (12.5--50MBytes/s)

Wide Ultra2 SCSI: 80MBytes/s

Ultra3 SCSI: 80MBytes/s

Wide Ultra3 SCSI: 160MBytes/s

FC-AL Fiber Channel: 100-400MBytes/s

more...