| http://www.w3.org/ns/prov#value | - No. 08/736,161 filed Nov. 25, 1996, all of which are hereby incorporated by reference herein. [0113] Gimbal mechanism 140 can be supported by a grounded surface 142, which can be, for example, a surface of the housing of interface device 14 (schematically shown as part of member 144), a base, tabletop, or other surface that is fixed in position with reference to the user.
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