What are the previous versions of SharePoint 2013?
The previous two versions are MOSS 2007 and SharePoint 2010.
How to Install SharePoint 2013?
As SharePoint is a server side software, it requires the Windows Server operating system. You can start with a new installation or use a Virtual Machine. Once you have the Operating System ready, you can download and install SharePoint 2013 from the following link: http://technet.microsoft.com/en-us/evalcenter/hh973397.aspx.
Following are the core hardware requirements:
RAM 8 GB
HDD 80 GB
Following are the software requirements:
Windows Server 2012
Microsoft SQL Server 2012 64-bit
Internet Information Services 7.5
Microsoft .NET 4.5
More detailed information can be found here:http://technet.microsoft.com/library/cc262485(office.15).aspx#reqOtherCap
In this article I would like to discuss the various SharePoint Roles. SharePoint Roles and Assignment to people is an essential step towards SharePoint project analysis and implementation.
Following are the most important Roles, I could identify here:
SharePoint Power User