ASP.NET Session

http://msdn.microsoft.com/en-us/library/system.web.sessionstate.httpsessionstate.sessionid.aspx

http://msdn.microsoft.com/en-us/library/ms178581.aspx

Productivity suite by the Top 3

Docs, Sheets, Slides          = Google

Pages, Numbers, Keynote  = Apple

Word, Excel, PowerPoint    = Microsoft