Devices: Canon CanoScan FB330P/FB630P Color Flatbed Scanners
Check pages 22-23 of this copy of your Canon Canoscan 630P Product Guide.
You'll need an "IBM-type" parallel printer cable - with a DB25 on each end, and your computer will also need to have an "IBM-type" DB-25 parallel printer port.
What the Canon Product Guide fails to mention is that this "IBM-type" printer cable is a kluged Centronics parallel printer cable, but became so popular (on older computers - your laptop may not have this port), that it got an IEEE standard: IEEE 1284 (with DB25 connectors on both ends).
You'll need a DB25-to-DB25 M/F cable, meaning DB25 connectors on both ends, with a Male on one end, and a Female on the other end.
The Male DB25 will plug into the Female DB25 connector on your computer/laptop, with the Female DB25 going to the FB630P Color scanner..
Here are some pictures/pricing:http://www.computercablestore.com/IEEE_1284_Printer_DB25_to_DB25_catID2134.aspx
The nice thing about the design of the Canon FB630P Color Scanner is that the scanner also has a Female DB25 Printer port for an existing parallel printer, so when you connect an FB330P/FB630P to your system, your existing parallel printer is daisy-chained through this port - so you needn't give up you printer (to scan), nor must you install another parallel printer port onto your PCI-bus tower PC to keep your printer.
Canon Canoscan FB330P/FB630P Color Scanner Product Guide (82 pages):http://canoncanada.custhelp.com/ci/fattach/get/267/
Most modern printers are USB-attached to laptop systems, so you may need an adapter, an example of which is seen here:http://www.cablestogo.com/product.asp?cat_id=116&sku=16899