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System & License Management
Mathematica has flexible capabilities for per-machine or network license management.
SystemInformation — detailed information on Mathematica system setup
    
$MachineID — unique ID for your computer system
$MachineName  ▪ $MachineDomains  ▪ $MachineAddresses
    
$LicenseID — license ID under which you are running your Mathematica
$LicenseServer — name of the license server authorizing your Mathematica
$LicenseExpirationDate — expiration date for temporary Mathematica licenses
    
$ProcessID  ▪ $ParentProcessID  ▪ $UserName
Environment — operating-system environment variables
    
mathlm — Mathematica license manager daemon
monitorlm — monitor current Mathematica license activity
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