Publishing on the World Wide Web. Web publishers have a choice to make their web sites OPEN to the general pool of all Internet users, or CLOSE them, and thus make the information accessible only to those with advance authorization [le Web donne accès à des contenus qui sont soit publics soit privés].
A distributed system with no centralized control. 1. Running on tens of thousands of individual computers [serveurs] on the Internet, the Web is what is known as a distributed system ; 2. No single organization controls any membership in the Web, nor is there any centralized point from which individual web sites or services can be blocked from the Web.
Contrast to closed databases. The Web's OPEN [tout le monde peut accéder aux contenus], DISTRIBUTED [les contenus diffusés sont répartis sur des serveurs], DECENTRALIZED [il n'y a pas de ticket d'entrée : le Web est un club ouvert qui donne à chacun la possibilité de publier (ou de partager) comme il l'entend].