The computer is used to record the physiological responses displayed by a subject during the examination.
Bespoke software, developed by the manufacturers of the equipment, governs the process.
This software does not allow the recorded data to be altered or manipulated in any way by the polygraph examiner.
The software prohibits the polygraph examiner to access the recorded data at all.
The pure recorded data is the only information that can be used by an examiner to substantiate his opinion.