Definitions for "Twain"
Technology Without Any Interesting Name
An interface that regulates communication between software applications and imaging devices. It is used for acquiring images captured by scanners and digital cameras.
A software standard that allows document scanners to be directly controlled via software. White page detector Feature of document management software for use of double-sided scanners that detects if a blank page exists and removes it from memory.
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Two; -- nearly obsolete in common discourse, but used in poetry and burlesque.
Keywords:  kind, items, two
two items of the same kind