Radio-Frequency Identification (RFID) is the use of a wireless non-contact radio system to transfer data from a tag attached to an object for the purposes of automatic identification and tracking. The tag contains electronically stored information which can be read from a certain distance. Nvis 4000 Series of RFID Access Systems are developed for Attendance application, Door Access, Object Identification or Detection, and many other Security applications. Nvis 4000 Series can be used at Schools, Colleges, Offices, Amusement Parks, etc. It is provided with a user friendly software for different applications.