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 8,709,015 websites that are Yahoo User Interface Customers. We know of 3,513,630 live websites using Yahoo User Interface and an additional 5,195,385 sites that used Yahoo User Interface historically and 2,462,019 websites in the United States.
Get a list of 8,709,015 websites using Yahoo User Interface which includes location information, hosting data, contact details, 3,513,630 currently live websites and an additional 2,134,631 domains that redirect to sites in this list. 5,195,385 sites that used this technology previously and 2,462,019 websites in the United States currently using Yahoo User Interface.
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