New and modified commands

• CLIP-SPECTRUM -- Sets all values in a spectrum outside of the specified range to a specified value.

• CONCATENATE-SPECTRA -- Combines all sub-bands of the spectra in X and Y stack positions into a new spectrum (the individual subbands are retained).

• WRITE -- A version of PRINT modified to write into an SCL character variable which can then be used in response to a request of character input (a filename say)

• READ-FITS-SPECTRUM -- Reads a SPECX or CLASS FITS spectrum from a disk-FITS file into the X stack position.

• OPEN-FITS-FILE -- Replaces OPEN-FITS-OUTPUT-FILE, and has new questions.

• CLOSE-FITS-FILE -- Replaces CLOSE-FITS-OUTPUT-FILE

• SET-PLOT-SCALE -- Now lets you specify auto-scaling for the X and Y plot axes separately.

• SET-MAP-PARAMETERS -- Now lets you specify that the map axes are to be scaled in sexagesimal form - i.e., RA and Dec in HMS.

• SHOW-VARIABLES -- Accepts VMS-type wildcards, so that, for example, the command ``>> show-var f*'' will return all SCL variables that begin with the letter f.

• PLOT-LINE-PARAMETERS-- As well as the existing set of parameters (Tmax, Vmax, Integrated intensity and Delta(v)), now also offers you the 1st and 2nd moments of the line profile. The 1st moment is the Centroid; the 2nd moment approximates the line width for lines of good Signal/Noise ratio.