background - Fit and subtract a line or column background
          bplot - Batch plots of spectra
      calibrate - Apply extinction and flux calibrations to spectra
       deredden - Apply interstellar extinction correction
         dopcor - Apply doppler corrections
	 fceval - Evaluate coordinates using the FITSCOORDS solutions
      fitcoords - Fit user coordinates to image coordinates
       identify - Identify features
   illumination - Determine illumination calibration
         lcalib - List calibration file data
      lscombine - Combine longslit images
     reidentify - Reidentify features
       response - Determine response calibration
         sarith - Spectrum arithmetic
          scopy - Sum and extract spectra from long slit to 1D format
       sensfunc - Create sensitivity function
     setairmass - Compute effective airmass and middle UT for an exposure
          setjd - Compute and set Julian dates in images
	  sflip - Flip data and/or dispersion coordinates in spectra
       specplot - Stack and plot multiple spectra
      specshift - Shift spectral dispersion coordinate systems
          splot - Preliminary spectral plot/analysis
       standard - Identify standard stars to be used in sensitivity calc
      transform - Transform longslit images to user coordinates

     extinction - Apply atmospheric extinction corrections to images (obsolete)
      fluxcalib - Apply flux calibration to images (obsolete)

	  demos - Demonstration and test playbacks