Portable document scanner, the basics
One does not need to look far for the reason; a person's full contact details, as given on such a visiting token, would take much too long to recite and store on a personal digital assistant, even the likes of which are out today. Furthermore, exchanging business cards is still a means of social formality. Of course, they may easily get lost or misplaced. Data stored in digital form does not suffer from this risk. Despite that, manually transferring data for every contact you meet into your cell phone is much too tedious a task.