Canon MultiPASS C50 Software User's Manual page 188

Printer driver
Software that sends printing instructions to a printer. The printer driver
keeps track of the attributes of a printer and the codes a program must
send to access those attributes.
T
TWAIN
Both a protocol and an application programmer's interface (API) that
allows you to input image data directly from any source (for example:
desktop and hand-held scanners, video capture boards, digital cameras,
and other imaging equipment) without requiring you to switch out of the
application. It provides compatibility between image input devices and
applications by acting as the liaison between hardware devices and
software applications. Because your C50 supports TWAIN, you can use
the scanning features of the C50 with any Windows application that
supports TWAIN (such as Corel Print House Magic). Twain, the industry
standard, was developed by the TWAIN working group which consists
of representatives from many leaders in the scanner hardware and
software industry.
Glossary G-3