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.