A question from Yahoo! Answers:

Need documentation on how to get stock quotes from yahoo for software applications?

You don’t need any documentation. Just have your application download the URL composed of the following:

1. http://finance.yahoo.com/d/quotes.csv?s=
2. Stock symbol or comma-separated list of symbols, and
3. &f=sl1d1t1c1ohgv&e=.csv

Examples:

http://finance.yahoo.com/d/quotes.csv?s=…
http://finance.yahoo.com/d/quotes.csv?s=…