The first police badges were the coat of arms worn by medieval knights, these coats of arms were worn by knights on their shields to identify his allegiance to justice. That's why today we call a police badge a shield.

The first police badges were the coat of arms worn by medieval knights, these coats of arms were worn by knights on their shields to identify his allegiance to justice. That's why today we call a police badge a shield.

System software is a type of computer program that is designed to run a computer's hardware and application programs. If we think of the computer system as a layered model, the system software is the interface between the hardware and user applications.