LIST

        LAS\LIST [IN|OUT] [/BRIEF] [/LONG]  [/SCAN]  [/OUTPUT  File]  [/TOC]
    [/VARIABLE VarName]

    List header information about an ensemble of Observations.  LIST is used
    for a quick look to Observation headers, in a more or less detailed for-
    mat.  IN or OUT keyword specifies the file to be listed.  If absent, the
    current index is listed. A medium-sized format is used by default.
    LIST IN       List the whole input file (all versions, see FIND /ALL)
    LIST OUT      List the whole output file (all versions)
    /BRIEF        Brief format
    /LONG         Long format
    /SCAN         Scan based compact format
    /SCAN /BRIEF  Scan numbers followed by the number of spectra in each scan
    /TOC          Display the table of contents. See subtopic for details.
    /OUTPUT File  Send the list to a file

    Some options are particularly well suited for large ensemble of spectra:
    /SCAN  displays  the  index  on a scan number basis (defined by a unique
    SOURCE, LINE, TELESCOPE and SCAN number), /SCAN /BRIEF gives the list of
    scan numbers with their total number of spectra. /SCAN and /LONG options
    are incompatible.