The serial numbers on guitars and basses started at #500, reserving prior numbers for special instruments or presentation.Guitars and Basses had their own numbering system, the only other instrument to receive its own system was the Broadcaster.
The writing process, called flux reversal, causes a change in the magnetic field that can be detected by the magnetic stripe reader.
Since there can be two different flux reversals, N-N or S-S, there can be two different information states, much like the binary system used by computers.
Although incidents of serial killing are widely reported in the media because of the heinous and unusual nature of these crimes, there are actually very few serial killers relative to the general population.
Research into this phenomenon is ongoing, and a small industry has sprung up around the practice of "profiling" serial killers in order to assist in their apprehension.
But, law enforcement officials agree that each serial killer is unique.
Society does not currently have sufficient knowledge to predict serial killing before it occurs and thus prevent it from happening.
The magnetic stripe on the back of a badge is composed of iron-based magnetic particles encased in plastic-like tape.
Each magnetic particle in the stripe is a tiny bar magnet about 20-millionths of an inch long.
When all the bar magnets are polarized in the same direction, the magnetic stripe is blank.
Information is written on the stripe by magnetizing the tiny bars in either a north or south pole direction with a special electromagnetic writer, called an encoder.
Serial killers and their victims include people from all races, cultures, nationalities, economic background, educational levels, genders, and sexual orientations.