Biofeedback is a tool that helps individuals visualize how their biological systems work. For example, software can show individuals what their heart is doing and how basic changes in their breathing can influence their heart beat and overall health.
Soft copy means a data or information which can be stored in any kind of digital memory. It is an intangible form of preserving the material. You can see the record but cannot touch it. Monitors or others display screens are used to see the soft copy results.
Shadow Copy (also known as Volume Snapshot Service, Volume Shadow Copy Service or VSS) is a technology included in Microsoft Windows that allows taking manual or automatic backup copies or snapshots of computer files or volumes, even when they are in use.