- Mount Daniel is the highest summit on the Cascade Range crest of Alpine Lakes Wilderness of the central Washington, United States. It is the highest point in King and Kittitas counties. Streams on its eastern slopes form the headwaters of the Cle Elum River.
- a home page for the AXIOM OF CHOICE (math.vanderbilt.edu)
The Axiom of Choice (AC) was formulated about a century ago, and it was controversial for a few of decades after that; it might be considered the last great controversy of mathematics. It is now a basic assumption used in many parts of mathematics.