ControlActive[act, norm] evaluates to act if a control that affects act is actively being used, and to norm otherwise.

CopyToClipboard[expr] replaces the contents of the clipboard with expr.

Element[x, dom] or x \[Element] dom asserts that x is an element of the domain dom. Element[{x_1, x_2, ...}, dom] asserts that all the x_i are elements of dom. Element[patt, ...

<< name reads in a file, evaluating each expression in it, and returning the last one.

Message[symbol::tag] prints the message symbol::tag unless it has been switched off. Message[symbol::tag, e_1, e_2, ...] prints a message, inserting the values of the e_i as ...

f /: lhs = rhs assigns rhs to be the value of lhs, and associates the assignment with the symbol f.

x*y*z, x*y*z, or x y z represents a product of terms.

You can ask for information about any object, whether it is built into Mathematica, has been read in from a Mathematica package, or has been introduced by you. Ways to get ...

BindEvent[name | {target, name} | {target, name, filter}, object | script | call, ...] binds an event from one object to a listener or to a script.

ParallelEvaluate[expr] evaluates the expression expr on all available parallel kernels and returns the list of results obtained.ParallelEvaluate[expr, kernel] evaluates expr ...