On the Internet and in other networks, QoS is the idea that transmission rates, error rates, and other characteristics can be measured, improved, and, to some extent, guaranteed in advance. QoS is of particular concern for the continuous transmission of high-bandwidth video and multimedia information. Transmitting this kind of content dependably is difficult in public networks using ordinary "best effort" Protocols. Using ATM, which also lets a company or user preselecta level of quality in terms of service, QoS can be measured and guaranteed in terms of the average delay at a Gateway and the transmission error rate.

A Barcode Symbology. QR Code is an Area Symbology.

QR Code can encode up to 7089 numeric characters or 4296 alphanumeric characters.

 
See Symbologies (List) for a list of common Symbologies.

In Barcode Symbology, the quiet zone is the clean area immediately before and after the barcode. This area must be free and clear of any marks and is specified in most Symbologies to be at least 10X in size.



See Symbologies (List) for a list of common symbologies.

Pronounced KWEHR-tee, refers to a keyboard type having all letters, numbers, punctuation, and others with the keys laid out like a typewriter.

QWERTY comes from the first six letter in the upper row of letters.