US Patent 7495792 Programmable physical document

A programmable document includes a physical document having at least one sheet of material and information recorded thereon and a computer attached to the physical document. The computer includes an input/output device, a processor and a memory storing the recorded information in digital form and metadata pertaining to the physical document. By attaching small, inexpensive, computing devices to paper documents, various electronic information associated with the physical document can be retained, updated and modified.