| Agile reader |
| Generic term for a reader that can read different types of RFID tags, such as those made by different manufacturers, or those that operate at different frequencies. |
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| Amplitude |
| The maximum height of a radio wave. |
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| Analog data |
| Information that is represented by continuously changing physical quantity, such as length or height of an electromagnetic wave (see below). |
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| Antenna |
| A device for sending or receiving electromagnetic waves. |
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| Anti-collision |
| A technique used to prevent several tags in the field of a single reader, or readers with overlapping fields, from interfering with one another. Anti-collision algorithms typically work by ensuring that the tags or readers donft transmit at the same time. |
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