-- Focusing and PSF measuring tasks --
     psfmeasure - Measure PSF sizes from stellar images
      specfocus - Determine spectral focus and alignment variations
      starfocus - Determine direct focus variations from stellar images

-- Observation planning tasks --
	ccdtime - CCD photometry exposure time calculator
       pairmass - Plot airmass vs time for a given coordinate
	 sptime - Spectroscopic exposure time calculator
       specpars - Spectrograph instrument parameters for sptime

-- Instrument/detector characterization --
       bitcount - Accumulate the bit statistics for a list of images
       findgain - Estimate the gain and readnoise of a CCD 
        shutcor - Shutter correction from images of varying exposure times

-- Miscellaneous
       cgiparse - Parse STRING_QUERY environment variable into task parameters