$System (Built-in Mathematica Symbol)

$System is a string describing the type of computer system on which Mathematica is being run.

Mathematica System Administration (Mathematica Overview)

MathLM Mathematica

SystemOptions (Built-in Mathematica Symbol)

SystemOptions["name"] gives the current setting for the internal system option with the specified name.SystemOptions[] gives the current settings for all settable internal ...

System Information (Mathematica Guide)

Mathematica gives convenient machine-independent programmatic access to a broad range of information about your computer system.

$SystemCharacterEncoding (Built-in Mathematica Symbol)

$SystemCharacterEncoding gives the default raw character encoding for the computer system on which Mathematica is being run.

$OperatingSystem (Built-in Mathematica Symbol)

$OperatingSystem is a string giving the type of operating system under which Mathematica is being run.

$SystemID (Built-in Mathematica Symbol)

$SystemID is a short string that identifies the type of computer system on which Mathematica is being run.

SetSystemOptions (Built-in Mathematica Symbol)

SetSystemOptions["name" -> value] resets the value for the internal system option with the specified name.

System & License Management (Mathematica Guide)

Mathematica has flexible capabilities for per-machine or network license management.

ClearSystemCache (Built-in Mathematica Symbol)

ClearSystemCache[] clears internal system caches of stored results.