Library /sys$common/syshlp/acledt.hlb CTRLU_KEY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    DELETE TO BEGINNING OF LINE (Ctrl/U)

    Deletes the text from the cursor to the beginning of the line.

    UNDELETE LINE (GOLD-Ctrl/U)

    Inserts the contents of the deleted line buffer into the line at
    the current position. The line might wrap automatically.