A Yahoo! Group has two primary features: an email list and a collection of web resources. To subscribe to the mailing all you need is an email address, to access the web resources you'll need an account at Yahoo so that you can sign in.
Note: over time Yahoo! has made changes to the procedures to create accounts and to join groups. So understand that any instructions you find, even Yahoo!'s own help pages, may contain obsolete information or may be missing needed information. If you find any error or inaccuracy in this information you can help by writing or correcting items, or just by commenting. Please read About YahooGroupedia.