Deployment and version's of joomla

version's of joomla:-
Joomla (Joomla! 1.0.0) was released on September 16, 2005. It was a re-branded release of Mambo 4.5.2.3 which, itself, was combined with other bug and moderate-level security fixes.
Joomla! version 1.5 was released on January 22, 2008, the most recent release (November 5, 2010) being 1.5.22.[12]
Joomla 1.6.0[13] was released on 10th January 2011.[14] This version adds a full access control list functionality plus, user-defined category hierarchy, and admin interface improvements.[15]
Joomka 1.7 [16] will drop in July, and Version 1.8 will be delivered one year from now.

Deployment:-
Joomla can be installed manually from source code on a system running a web server which supports PHP applications, from a package management system or using a TurnKey Joomla appliance which comprises the application and its dependencies as a ready-to-use system.[17]
There are numerous web hosting companies who provide a control panel which automates the deployment of a basic Joomla web site.
Joomla can also be installed via the Microsoft Web Platform Installer which installs the software on Windows and IIS. The Web PI will automatically detect any missing dependencies such as PHP or MySQL then install and configure them before installing Joomla.[18]