This is an official ODERSA website.Here’s how you know

The official domain

The address of this site ends in odersa.org. Every service the association runs sits on a subdomain of odersa.org and nowhere else. If the address in your browser’s address bar does not end in odersa.org, this site is not ours.

Free, and no account

Everything is open straight away. No sign-up, no account, no password, no subscription, no advertising. Nothing is held back for those who pay, because there is nothing to pay for.

No data collected

This site does not follow you: no tracker, no tracking cookie, no measurement tool built into these pages, and nothing measured on your device. Our host counts requests in aggregate, as any server that answers does: a total, never a profile. You do not have to take our word for it: open your browser’s developer tools, go to the Network tab, and reload the page. You will see the full list of what the site asks for. Everything comes from odersa.org, nothing goes anywhere else.

Free to reuse

The content is published under the CC BY 4.0 licence. You may copy it, translate it, print it and pass it on, for your classes as much as for the people around you, on one condition only: credit ODERSA.

Report a mistake

A wrong date, a dead link, a phrase that misleads: tell us, and it gets put right.

The message goes through your own mail software, with the subject and the body already filled in. We keep nothing but what you write, and only for as long as it takes to put things right.

Three things are enough: which page, what it says, what would be right. The message already asks for them, all that is left is to fill them in.

Write to letters@odersa.org

If your browser does not open any mail software, write straight to letters@odersa.org, giving the address of the page concerned.