Server variables

Server.ColdFusion.ProductName
Server.ColdFusion.ProductVersion
Server.ColdFusion.ProductLevel
Server.ColdFusion.SerialNumber
Server.ColdFusion.SupportedLocales
Server.ColdFusion.AppServer
Server.ColdFusion.Expiration
Server.ColdFusion.RootDir 
Server.ColdFusion.UpdateLevel
Server.OS.Name
Server.OS.AdditionalInformation
Server.OS.Version
Server.OS.BuildNumber