AJAX Magazine: Yahoo! UI Cheat Sheets Available
There are now Cheat Sheets for YUI providing quick references to the key methods, properties, and syntax patterns of each component. When you find yourself elbow-deep in a coding problem, sometimes it's quicker to turn to these rather than firing up a browser to review documentation and examples — and reviewing the cheat sheets can help you discover hidden gems you didn't know were there. Currently there are five Cheat Sheets for Animation, Connection, DOM, Drag and drop, and Event utility.
AJAX Magazine: Yahoo! UI Cheat Sheets Available
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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. The YUI Library also includes several core CSS resources
http://developer.yahoo.com/yui/#cheatsheets