9 Devices for tracking the position of objects and body parts in three-dimensional space for use in simulation, modeling, and training applications, medical interventions, robotic sensing and control, physical rehabilitation, transcription, and product design, assembly, and maintenance; sensors for tracking the position of objects and body parts in three-dimensional space for use in simulation, modeling, and training applications, medical interventions, robotic sensing and control, physical rehabilitation, transcription, and product design, assembly, and maintenance; downloadable and recorded computer software for tracking the position of objects and body parts in three-dimensional space for use in simulation, modeling, and training applications, medical interventions, robotic sensing and control, physical rehabilitation, transcription, and product design, assembly, and maintenance; devices for generating a magnetic field for tracking the position of objects and body parts in three-dimensional space; sensors for detecting changes in a magnetic field; downloadable and recorded computer software for tracking the position of objects and body parts in three-dimensional space using a magnetic field