An RFID Based Attendance System uses RFID technology to automatically record attendance for individuals. It typically consists of a reader and a number of tags or cards for each individual. The reader is usually connected to a computer, and the tags or cards contain unique identifying information that is associated with a particular person. This project developed in VB.NET and record stores in SQL server.

To use the system, individuals would carry their tags or cards with them and pass them near the reader in order to have their attendance recorded. The reader would then send the identifying information from the tag or card to the computer, which would record the attendance in a database.

There are many potential applications for an RFID based attendance system, including recording attendance at schools, offices, and events. It can be a convenient and efficient way to track attendance, as it allows individuals to simply pass their tags or cards near the reader rather than having to sign in manually.

There are several key components or modules that are typically included in an RFID based attendance system:

1. RFID reader: This is the device that reads the unique identifying information from the tags or cards. It is usually connected to a computer or other device that can process the information.
2. RFID tags or cards: These are the devices that are carried by the individuals whose attendance is being recorded. They contain unique identifying information that is associated with a particular person.
3. Database: This is a system for storing the attendance data that is collected by the RFID reader. It may be a local database on the computer that is connected to the reader, or it may be a remote database that is accessed over a network.
4. User interface: This is the means by which users can interact with the attendance system. It may include a computer program or web application that allows users to view and manage the attendance data.
5. Integration with other systems: Depending on the specific application, the RFID based attendance system may need to be integrated with other systems, such as a student management system or a payroll system. This would typically involve using application programming interfaces (APIs) to exchange data between the systems.