If you have a Google account, you may use it to sign into Stemmaweb.
If you have an account with an OpenID provider (e.g. WordPress, Blogger, Flickr, Yahoo), you may use it to sign into Stemmaweb.
If you do not have Google or another OpenID account, you may register for a user account here with its own password. Once you are registered, you can use this form to sign in.