Yellow
(Built-in Mathematica Symbol) Yellow represents the color yellow in graphics or style specifications.
$Aborted is a special symbol that is returned as the result from a calculation that has been aborted.
$Epilog
(Built-in Mathematica Symbol) $Epilog is a symbol whose value, if any, is evaluated when a dialog or a Mathematica session is terminated.
$Line
(Built-in Mathematica Symbol) $Line is a global variable that specifies the number of the current input line.
$MachineType is a string giving the general type of computer on which Mathematica is being run.
$MinPrecision gives the minimum number of digits of precision to be allowed in arbitrary-precision numbers.
$OperatingSystem is a string giving the type of operating system under which Mathematica is being run.
$ParentProcessID gives the ID assigned to the process which invokes the Mathematica kernel by the operating system under which it is run.
$SystemCharacterEncoding gives the default raw character encoding for the computer system on which Mathematica is being run.
Two ways to set up automatic numbering in a Mathematica notebook. These cells are in DisplayFormulaNumbered style. DisplayFormulaNumbered style is available in the default ...