One possibility is to start with the main menu which offers a simple way to interrogate the database.
To display the main menu, enter:

A number of preliminary texts describe the database and they can be reached by answering "dsc" to the main menu choice > dsc displays the general menu
Which subject? doc
Which subject? f
Other information (y/n/f)? y
Which subject? n
Which subject? 1
Autre information? y
Which subject? 2
Autre information? n
Which subject? end
The command bdp may be started from the main menu: the action then corresponds to the syntax bdp and one only gets a listing of the file.
> go
Express your wish: bdp
For which cluster: ngc/0457
suite (y/n)? y
For which cluster? ngc/0581
suite (y/n)? n
Express your choice: fin
lyn can be called from the main menu "go". In this case one should give the complete name of the cluster, as for example: ngc/2516 or anon/tr16.
The main menu "go" offers a simple interactive interrogation for ref.