$CompilationTarget gives the default value for the option CompilationTarget of Compile.
$HistoryLength specifies the number of previous lines of input and output to keep in a Mathematica session.
In the standard notebook front end, Mathematica allows you to set a large number of global options. The values of all these options are by default saved in a "preferences ...
Options associated with the interactive entering of expressions. The option SingleLetterItalics is typically set whenever a cell uses TraditionalForm. Here is an expression ...
Mesh
(Built-in Mathematica Symbol) Mesh is an option for Plot3D, DensityPlot, and other plotting functions that specifies what mesh should be drawn.
AccountingForm[expr] prints with all numbers in expr given in standard accounting notation. AccountingForm[expr, n] prints with numbers given to n-digit precision.
ParabolicCylindrical represents the parabolic cylindrical coordinate system with default variables Uu, Vv, and Zz. ParabolicCylindrical[u, v, z] represents the parabolic ...
Paraboloidal represents the paraboloidal coordinate system with default variables Uu, Vv, and Pphi.Paraboloidal[u, v, \[Phi]] represents the paraboloidal coordinate system ...
Unicode: F760. Alias: Esc am Esc. Letter-like form. Invisible by default on display. Used as a marker to indicate, for example, how entries in a GridBox column should be ...
\[And]
(Mathematica Character Name) Unicode: 2227. Aliases: Esc && Esc, Esc and Esc. Infix operator with built-in evaluation rules. x ∧ y is by default interpreted as And[x,y], equivalent to x&&y. Not the same ...