This site uses four types of cookies.

1. md5-hash: Used for login authentication.
* Importance: **necessary** for anyone who needs to log in, if you are just browsing, then nothing is stored.
* Content: encrypted username and password.
* Expires: in a year, but only if "Remember me" was checked when logging in; otherwise: at the end of the browser session.

2. Preferences: Used for remembering user preferences, like the size of the editor textarea.
* Importance: **functional**
* Typical content: name/value pairs in plain text.
* Expires: in a year, or you could delete your cookies before that.

3. PHP session identifier: Used to hold temporary data and to avoid CSRF attacks.
* Importance: **necessary**
* Typical content: random ID.
* Expires: at the end of the browser session.

4. Google Analytics: Used to track the amount of users on the site, busy hours, and countries to improve the service provided.
* Importance: **functional**
* Typical content and Expiration: Can't say what Google uses this for, but for more information look at Google Analytics page.