TWAIN is NOT a format, it is a protocol. TWAIN is used to "Pull" scan from a device directly into a software application. 64 bit TWAIN drivers are rare at best, however many 32 bit TWAIN drivers will work in a 64 bit OS as long as the software app you are using is 32 bit software. i.e. Photoshop 32 bit with a 32 bit TWAIN driver will work on a 64 bit OS.
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