The basis of computerized Time Attendance and Access Control solutions started when card based machines were launched several years back. The first cards based technologies were Barcode & Magnetic where printed barcode on card OR encoded magnetic stripes were swiped in machines to transfer user data for transactions. Later, RFID was introduced & took over as the touchless card based technology. Several types of RFID, barcode & magnetic machines exist in industry serving numerous organizations for their Time Attendance & Access Control requirements.
Individual cards are issued to users who are then uniquely identified by the machines, marking their transaction and also validating/authorizing any barrier to open against valid transaction. When used with flap barriers, turnstiles, etc. these machines can provide a total security solution for the organization.