17. A system comprising a document-driven scanning input device communicating with a computer, said input device comprising scanning means for generating image data representing the image of a document, and means, responsive to placement of a document by a user, for drawing the document into scanning relationship with said scanning means so that said scanning means generates image data representing the image of the document, wherein said placement alone is sufficient to initiate said drawing, and said computer comprising means for storing said image data generated in response to said placement.
17. A system comprising a document-driven scanning input device communicating with a computer, said input device comprising scanning means for generating image data representing the image of a document, and means, responsive to placement of a document by a user, for drawing the document into scanning relationship with said scanning means so that said scanning means generates image data representing the image of the document, wherein said placement alone is sufficient to initiate said drawing, and said computer comprising means for storing said image data generated in response to said placement. 18. A system according to claim 17 wherein said means for drawing the document into scanning relationship with said scanning means sends an interrupt to said computer in response to said placement and wherein said computer stores said image data in response to receiving said interrupt and said image data.