Consider some of the ways we use ID cards these days. Many people carry gym membership cards which contain a barcode that you scan with a card reader before entering the facility. Some corporate offices require employees to carry proximity cards to gain access to office buildings, or smart cards to log onto company computers and networks. Colleges and universities use multifunctional student ID cards with magnetic stripe encoding to store meal plan information, check out books from the library, and grant access to a student recreation center. Cards are typically swiped, or access can be granted when the card comes into close proximity to a reader.
Imagine a printer that can produce ID cards for any or all of those applications, and many more. Such ID Card Making Machines exist, and they're playing a significant role in the day to day operations of countless businesses, schools, and organizations.