* Please use the OPAL mailing list opal@ … (opal AT lists.psi.ch) to discuss problems and issues. Add yourself to the [mailing list](https://psilists.ethz.ch/sympa/subscribe/opal)
* A very short introduction to MOO [moo-intro.pdf](/uploads/0139575bea3d80254929a1645909e50d/moo-intro.pdf)