file.cdf is a Computable Document Format file.
file.nb is a Mathematica notebook file.
"SelectionConvert" converts the selected cells into a new format.
Edit Stylesheet edits the style definitions for the current notebook.
AllowGroupClose is an option for Cell that specifies whether a cell group can be closed normally.
AllowReverseGroupClose is an option for Cell that specifies whether a cell group can be reverse closed.
AutoMultiplicationSymbol is an option for objects such as Cell and Notebook that specifies whether to automatically display a multiplication symbol between numbers that would ...
BinormalDistribution[{\[Mu]_1, \[Mu]_2}, {\[Sigma]_1, \[Sigma]_\ 2}, \[Rho]] represents a bivariate normal distribution with mean {\[Mu]_1, \[Mu]_2} and covariance matrix ...
Bold
(Built-in Mathematica Symbol) Bold represents a bold font weight.
CellAutoOverwrite is an option for Cell which specifies whether an output cell should be overwritten by new output when the preceding input cell is evaluated.