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 9,932,776 websites that are Yahoo User Interface Customers. We know of 3,748,323 live websites using Yahoo User Interface and an additional 6,184,453 sites that used Yahoo User Interface historically and 2,552,952 websites in the United States.
Get a list of 9,932,776 websites using Yahoo User Interface which includes location information, hosting data, contact details, 3,748,323 currently live websites and an additional 2,250,854 domains that redirect to sites in this list. 6,184,453 sites that used this technology previouslyand 2,552,952 websites in the United States currently using Yahoo User Interface.
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