The Yahoo! User Interface (YUI) Library is a set of utilities and controls, written in JavaScript, for building richly interactive web applications using techniques such as DOM scripting, DHTML and AJAX.
https://developer.yahoo.com/yui/
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 8,898,061 websites Yahoo User Interface Customers. We know of 3,198,845 live websites using Yahoo User Interface and an additional 5,699,216 sites that used Yahoo User Interface historically and 2,180,999 websites in the United States.
Get a list of 8,898,061 websites using Yahoo User Interface which includes location information, hosting data, contact details, 3,198,845 currently live websites and an additional 1,876,193 domains that redirect to sites in this list. 5,699,216 sites that used this technology previouslyand 2,180,999 websites in the United States currently using Yahoo User Interface.
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