Wolfram System Session Information
The Wolfram Language gives you immediate access to many details of your Wolfram System session—in the form of symbolic expressions that can readily be manipulated by the Wolfram Language.
Names — names of known symbols
?name — information about symbol values, functions, etc.
Streams ▪ Links ▪ Notebooks ▪ $Packages ▪ $ContextPath ▪ $ContextAliases
SystemInformation — display system information
NotebookInformation — information on open notebooks
Options ▪ $FrontEndSession ▪ $FrontEnd ▪ CurrentValue
$SessionID ▪ $ProcessID ▪ $Username
Time Information »
TimeUsed ▪ SessionTime ▪ DateString ▪ AbsoluteTime ▪ ...