echelle: Echelle spectral reductions (slit and FOE)
- apall: Extract 1D spectra (all parameters in one task)
- apdefault: Set the default aperture parameters and apidtable
- apedit: Edit apertures interactively
- apfind: Automatically find spectra and define apertures
- apfit: Fit 2D spectra and output the fit, difference, or ratio
- apflatten: Remove overall spectral and profile shapes from flat fields
- apmask: Create and IRAF pixel list mask of the apertures
- apnormalize: Normalize 2D apertures by 1D functions
- aprecenter: Recenter apertures
- apresize: Resize apertures
- apscatter: Fit and subtract scattered light
- apsum: Extract 1D spectra
- aptrace: Trace positions of spectra
- bplot: Batch plots of spectra
- calibrate: Apply extinction and flux calibrations to spectra
- continuum: Fit the continuum in spectra
- deredden: Apply interstellar extinction corrections
- dispcor: Dispersion correct spectra
- dopcor: Doppler correct spectra
- ecidentify: Identify features in spectrum for dispersion solution
- ecreidentify: Automatically identify features in spectra
- refspectra: Assign wavelength reference spectra to other spectra
- sapertures: Set or change aperture header information
- sarith: Spectrum arithmetic
- scombine: Combine spectra
- scopy: Select and copy apertures in different spectral formats
- 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
- slist: List spectrum header parameters
- 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
- doecslit: Process Echelle slit spectra
- dofoe: Process Fiber Optic Echelle (FOE) spectra
- demos: Demonstrations and tests