What is the CLI feature called for Internal commands or folder alias

The screenshot below show the command line feature that is available in Directory opus.
What is this feature called?
It becomes available if you strike this key
>
From there you can run an internal command directly.
Alternatively if you strike the forward slash
/
It is possible then to enter a folder alias (see below)
I think the presentation of the various aliases (aliai?) as shown is called the find as you type feature.

Correct. It is all part of the Find-As-You-Type UI.