1. A device used to communicate with RFID tags. 2. The reader communicates with the RFID tag via radio waves and passes the information in digital form to a computer system.
3. A device that extracts and separates the information from the tag.

A generic term that usually refers to an RFID reader that can read tags operating at different frequencies or using different methods of communication between the tags and readers.

In computer science, an optical scanning device that reads texts which have been converted into a special bar code.

1. An input device which can scan curves from a continuous paper feed and convert them to digital data.
2. An instrument that scans curves by a graphical recorder on a continuous paper form and converts them into digital form.

Blocking readers from RFID data.

The area of coverage.

Tags outside the reader field do not receive radio waves and can't be read.

A means by which a passive UHF reader communicates with tags in its read field.

The reader sends energy to the tags but the tags sit idle until the reader requests them to respond.

The reader is able to find tags with specific serial numbers by asking all tags with a serial number that starts with either 1 or 0 to respond.

If more than one responds, the reader might ask for all tags with a serial number that starts with 01 to respond, and then 010.

This is called "walking" a binary tree, or "tree walking".

See Singulation for additional relevant information.

A device that can not only read information but also write new information to a tag.