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A Vendor Prefix is string of text before a variable/property to signal that the variable/property is a superset extension to an application/spec generally to add proprietary or experimental features.


Most use short abbreviations. Most start with a leading hyphen.

-ah-Antenna House
-apple-Webkit supports properties using the -apple- prefixes as well
-atsc-Advanced Television Standards Committee
-hp-Hewlett Packard
-khtml-Konqueror browser
-moz-Mozilla Foundation (Gecko-based browsers)
-o-Opera Software
-rim-Research In Motion
-ro-Real Objects
-tc-Tall Components
-wap-The WAP Forum
-webkit-Safari, Chrome (and other WebKit-based browsers)
-xv-Opera Software
mso-Microsoft Office
x-amz-Amazon (web services hosted data)

See Also