pab®-opto has been run since 1987 by Dr. Peter Apian-Bennewitz, contact: email
Most pages are available in English and German, some pages are currently in German only. Sorry about that, they will be added soon.
Which version is served depends on your language preferences, which is set in your browser configuration.
Netscape offers language selection at the menu
Edit - Preferences - General - Languages.
Furthermore, most pages allow manually selection by clicking on the flag displayed at the lower end of the page.
Secure transfer of project data is using our public key infrastructure pab root certificate (CA). More information is given here
Some more technical bits about the web