* Licensing Model: Free/Open Source, GNU General Public License, version 2
* Current Stable Version: 5.x
* Software Architecture: Web-based, Micro-core
* Programming Language: PHP
* Application Servers: Apache HTTP Server, Microsoft IIS, lighttpd, ...
* Database Servers: MySQL, PostgreSQL, Microsoft SQL Server
* Operating Systems: Windows, Linux, Mac OS X, *BSD, ...
* Extensibility: Third-party PHP modules using callback mechanism
* Scalability:
o Compatible with standard PHP accelerators (Alternative PHP Cache, eAccelerator, XCache, Zend Platform, ionCube)
o Compatible with standard Web application scalability techniques including caching, load balancing, database tuning, etc.
* Integratability:
o Exposes and consumes RPC-XML and REST interfaces for Web Service integration
o Exposes and consumes RSS feeds for content syndication
o Integrates with LDAP/Active Directory, SOAP Web Services, Single Sign-On, and many other open protocols
o Integrates with other application platforms such as Java (through the PHP/Java Bridge)
* Security:
o A list of security announcements is maintained on the Drupal site.
o Drupal is included on several specialized security advisory sites including OpenPKG, FrSIRT, etc.
* Maintainability:
o Drupal coding conventions are published and enforced
o Drupal documentation is largely community-contributed yet active