The edit-list BASIC program retrieves a previously saved list and enters the line editor (same as ed oredit). Each element in the list is treated as a line by the line editor; all of the line editor edit commands are valid. For using the Update processor to update saved lists.
The esc-level BASIC program specifies that pressing ESC pushes a level. The esc-level command uses the set-esc command to enable the special escape key. Without any argument, the usual escape value (x'1B' or 27) is assigned to the level pushing function. The optional argument defines an alternate value.
The exec command runs the current process on the specified ABS area. This has the effect of changing the environment of the D3 Virtual operating system for this process, until log off time. At log off, the abs file is automatically reset to the dm,abs, file.