19.3.1 HTTP - HyperText Transfer Protocol
   19.3.1.1 HTML - HyperText Markup Language
   19.3.1.2 XML e XHTML
   19.3.1.3 CGI - Common Gateway Interface
   19.3.1.4 Script lato server e lato client
   19.3.1.5 La sessione
  19.3.2 Apache
  19.3.3 Application server
  19.3.4 JSP, applet Java e Java bean
  19.3.5 CMS - Content Management System
   19.3.5.1 Zope
   19.3.5.2 Plone
  19.3.6 HTTPS - Secure HTTP