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 8,886,026 websites Yahoo User Interface Customers. We know of 3,633,220 live websites using Yahoo User Interface and an additional 5,252,806 sites that used Yahoo User Interface historically and 2,487,167 websites in the United States.
Get a list of 8,886,026 websites using Yahoo User Interface which includes location information, hosting data, contact details, 3,633,220 currently live websites and an additional 2,187,496 domains that redirect to sites in this list. 5,252,806 sites that used this technology previouslyand 2,487,167 websites in the United States currently using Yahoo User Interface.
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