_ Public Information System is a system that design to present information to the public or large audience all at the same time by making big clear sign, and advertisement.
Ex:_The Public Information System put sign and advertisement everywhere, so that the public people know more!
_Transportation also need this information.
*It is important that information are up-to-date, so the public know what is new and respect new rules or to buy new up-to-date things !
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