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PowerShell: tab completion

Command-line items that can be tab-completed include
ctrl+space prints available continuations of the currently entered fragment of a command or parameter.
Microsoft refers to tab completion as tab expansion.

See also

An unfortunate design decision of PowerShell was to recommend to use approved verbs when naming a cmdLet: in order to find a cmdLet with tab-completion, the tabulator has to be pressed quite a number of times.
The function tabExpansion2 which is called from the methods CompleteInput of the object System.Management.Automation.CommandCompletion
register-argumentCompleter

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