JavaClass[classname, n] represents a Java class with the specified name.
PieChart[{y_1, y_2, ...}] makes a pie chart with sector angle proportional to y_1, y_2, ....PieChart[{..., w_i[y_i, ...], ..., w_j[y_j, ...], ...}] makes a pie chart with ...
BaseForm[expr, n] prints with the numbers in expr given in base n.
CMYKColor[cyan, magenta, yellow, black] is a graphics directive which specifies that graphical objects which follow are to be displayed in the color given. CMYKColor[c, m, y, ...
DirectedInfinity[] represents an infinite numerical quantity whose direction in the complex plane is unknown. DirectedInfinity[z] represents an infinite numerical quantity ...
MathMLForm[expr] prints as a MathML form of expr.
OutputForm[expr] prints as a two-dimensional representation of expr using only keyboard characters.
f /: lhs := rhs assigns rhs to be the delayed value of lhs, and associates the assignment with the symbol f.
TeXForm
(Built-in Mathematica Symbol) TeXForm[expr] prints as a TeX version of expr.
Whenever machine-precision numbers appear in a calculation, the whole calculation is typically done in machine precision. Mathematica will then give machine-precision numbers ...