O’Reilly France: http://www.oreilly.fr/
O’Reilly Open Books Project: http://www.oreilly.com/openbook/
O’Reilly: Safari Books Online: http://safari.oreilly.com/
Ouest France: http://www.ouest-france.fr/
oVosite: http://hypermedia.univ-paris8.fr/ovosite/
Oxford Reference Online: http://www.oxfordreference.com/
Oxford University Press (OUP): http://www.oup.com/
Oxford University Press (OUP) USA: http://www.oup-usa.org/
Ozone: http://www.ozone.net/
Ozone Paris: http://www.ozoneparis.net/