Trigger (Built-in Mathematica Symbol)

Trigger[Dynamic[u]] represents a trigger that can be pressed to make the dynamically updated value of u be continually increased with time from 0 to 1. Trigger[Dynamic[u], ...

WindowFrameElements (Built-in Mathematica Symbol)

WindowFrameElements is an option for notebooks that specifies the elements to include in the frame of the window used to display the notebook on the screen.

$Failed (Built-in Mathematica Symbol)

$Failed is a special symbol returned by certain functions when they cannot do what they were asked to do.

$InstallationDirectory (Built-in Mathematica Symbol)

$InstallationDirectory gives the top-level directory in which your Mathematica installation resides.

$LicenseExpirationDate (Built-in Mathematica Symbol)

$LicenseExpirationDate is a date list that gives the expiration date for the license under which Mathematica is being run.

$Line (Built-in Mathematica Symbol)

$Line is a global variable that specifies the number of the current input line.

$Linked (Built-in Mathematica Symbol)

$Linked is True if the Mathematica kernel is being run through MathLink.

$MachineID (Built-in Mathematica Symbol)

$MachineID is a string that gives, if possible, a unique identification code for the computer on which Mathematica is being run.

$Notebooks (Built-in Mathematica Symbol)

$Notebooks is True if Mathematica is being used with a notebook-based front end.

$OperatingSystem (Built-in Mathematica Symbol)

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