Glossary

2 of 5
See Standard 2 of 5

2.5G
A term used to describe mobile telephony that offers Web access, but without offering the full functionality of 3G. Another name for GPRS

2D Code
A two dimensional barcode, able to pack significantly more data into the same space occupied by a conventional one dimensional (linear) barcode. Examples include DayaMatrix, QR Code, Aztec Code.

3D barcode
This is not a symbology, but a set of 8 methods of creating a raised 3D representation of a conventional barcode. Also known as a bumpy barcode the raised marks and flat surfaces ere the equivalent to conventional bars and spaces. The readers use a combination of laser light and CCD sensing to obtain a decode even in the complete absence of conventional optical contrast. Used in tough environments or on products with harsh manufacturing processes, 3D codes can even be painted over without affecting readability.

3G
Third generation mobile telephony providing full multimedia to the palm top device. The emerging standard is UMTS.

4G
A collective term for short-range wireless technologies, notably Bluetooth.

802.11
See IEEE 802.11.