expr_1; expr_2; ... evaluates the expr_i in turn, giving the last one as the result.
Default
(Built-in Mathematica Symbol) Default[f] gives the default value for arguments of the function f obtained with a _. pattern object. Default[f, i] gives the default value to use when _. appears as the ...
DelimiterFlashTime is an option for cells and notebooks that specifies how long in seconds a delimiter should flash when its matching delimiter is entered.
NotebooksMenu is a global option that specifies which recently opened notebooks are listed under the File menu.
expr >>> filename appends expr to a file. PutAppend[expr_1, expr_2, ..., " filename"] appends a sequence of expressions expr_i to a file.
SampledSoundList[{a_1, a_2, ...}, r] is a sound primitive that represents a sound whose amplitude has levels a_i sampled r times a second.
StandardForm[expr] prints as the standard Mathematica two-dimensional representation of expr.
x - y is equivalent to x + (-1*y).
Expressions corresponding to notebooks. Here is a simple Mathematica notebook. Here is the expression that corresponds to this notebook.
MathLink connections between Mathematica sessions. This starts up a link on port number 8000. This connects to the link on port 8000.