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A region having coded data thereon, wherein at least some of the coded data includes data indicative of a functional attribute of a part of the region. A sensing device for use with such a region, the sensing device for sensing and reacting to data indicative of a functional attribute of a part of t

A region having coded data thereon, wherein at least some of the coded data includes data indicative of a functional attribute of a part of the region. A sensing device for use with such a region, the sensing device for sensing and reacting to data indicative of a functional attribute of a part of the region.

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The invention claimed is: 1. A region having coded data thereon or therein, wherein the coded data is defined by a plurality of tags, each tag containing a plurality of substantially undifferentiated marks positioned relative to a set of predetermined nominal mark positions, and at least some of th

The invention claimed is: 1. A region having coded data thereon or therein, wherein the coded data is defined by a plurality of tags, each tag containing a plurality of substantially undifferentiated marks positioned relative to a set of predetermined nominal mark positions, and at least some of the tags encoding: a unique identity of the region; a location within the region; and a functional attribute of a part of a region wherein the functional attribute distinguishes between a submit button and at least one of a drawing field, a text field, a signature field, a hyperlink and a hypertext link, and wherein any 10 millimeter diameter area of the coded data indicative of the functional attribute of apart of the region includes sufficient information to identify the functional attribute. 2. The region according to claim 1, wherein each mark represents one of a plurality of coded values. 3. The region according to claim 2, wherein the coded value represented by a mark is at least partially determined by the position of the mark relative to the set of predetermined nominal mark positions. 4. The region according to claim 1, wherein the predetermined nominal mark positions are arranged relative to a plurality of nominal lines. 5. The region according to claim 4 wherein at least one pair of the lines are spaced apart from one another by a distance of less than 100 millimeters. 6. The region according to claim 1, wherein the marks have centers and wherein the relative spacing of the centers of at least one pair of adjacent marks is less than 12 millimeters. 7. The region according to claim 1, wherein each mark has a minimum radius and a maximum radius and wherein the length of a mark's minimum radius is greater than 40% of the length of that mark's maximum radius. 8. The region according to claim 1, wherein each tag within a region, includes data indicative of a functional attribute of a part of a region. 9. A method of coding a region including applying coded data to a least a part of the region, the coded data being defined by a plurality of tags, each tag containing a plurality of substantially undifferentiated marks positioned relative to a set of predetermined nominal mark positions, and at least some of the tags encoding: a unique identity of the region; a location within the region; and a functional attribute of a part of a region wherein the functional attribute distinguishes between a submit button and at least one of a drawing field, a text field, a signature field, a hyperlink and a hypertext link, and wherein any 10 millimeter diameter area of the coded data indicative of the functional attribute of a part of the region includes sufficient information to identify the functional attribute. 10. The method according to claim 9, wherein each mark represents one of a plurality of coded values. 11. The method according to claim 10, wherein the coded value represented by a mark is at least partially determined by the position of the mark relative to the set of predetermined nominal mark positions. 12. The method according to claim 9, wherein the predetermined nominal mark positions are arranged relative to a plurality of nominal lines. 13. The method according to claim 12, wherein at least one pair of the lines are spaced apart from one another by a distance of less than 100 millimeters. 14. The method according to claim 9, wherein the marks have centers and wherein the relative spacing of the centers of at least one pair of adjacent marks is less than 12 millimeters. 15. The method according to claim 9, wherein each mark has a minimum radius and a maximum radius and wherein the length of a mark's minimum radius is greater than 40% of the length of that mark's maximum radius. 16. A sensing device for use with a region having coded data thereon, the coded data being defined by a plurality of tags, each tag containing a plurality of substantially undifferentiated marks positioned relative to a set of predetermined nominal mark positions, and at least some of the tags encoding: a unique identity of the region; a location within the region; and a functional attribute of a part of a region wherein the functional attribute distinguishes between a submit button and at least one of a drawing field, a text field, a signature field, a hyperlink and a hypertext link, and wherein any 10 millimeter diameter area of the coded data indicative of the functional attribute of a part of the region includes sufficient information to identify the functional attribute. 17. The sensing device according to claim 16, wherein each mark represents one of a plurality of coded values. 18. The sensing device according to claim 17, wherein the coded value represented by a mark is at least partially determined by the position of the mark relative to the set of predetermined nominal mark positions. 19. The sensing device according to claim 16, wherein the predetermined nominal mark positions are arranged relative to a plurality of nominal lines. 20. The sensing device according to claim 19 wherein at least one pair of the lines are spaced apart from one another by a distance of less than 100 millimeters. 21. The sensing device according to claim 16, wherein the marks have centers and wherein the relative spacing of the centers of at least one pair of adjacent marks is less than 12 millimeters. 22. The sensing device according to claim 16, wherein each mark has a minimum radius and a maximum radius and wherein the length of a mark's minimum radius is greater than 40% of the length of that mark's maximum radius. 23. The sensing device of claim 16 wherein the sensing device provides at least one indication to a user when it senses data indicative of a functional attribute of a part of the region. 24. The sensing device of claim 23 wherein the indication is selected from the group comprising a visual, aural, haptic, tactile, vibratory and any other human sensory modality. 25. The sensing device of claim 16, wherein when the sensing device senses data indicative of a functional attribute of a part of the region, the sensing device transmits, to a computer system, said sensed data or data based at least partially on said sensed data. 26. A system including: computer system, and a sensing device for use with a region having coded data thereon, the coded data comprising a plurality of substantially undifferentiated marks positioned relative to a set of predetermined nominal mark positions and at least some of the coded data including data indicative of an identity of the region and a functional attribute of a part of the region, the sensing device for sensing coded data indicative if a functional attribute of a part of the region and for transmitting, to the computer system, said sensed data or data based at least partially on said sensed data, wherein the computer system executes, or commences execution of, a function related to the functional attribute of the sensed data, wherein each mark has a minimum radius and a maximum radius and wherein the length of a mark's minimum radius is greater than 40% of the length of that mark's maximum radius.