COSTAR    Verb to plot a symbol at given position on top of a TV image
GSTAR    Task to read a Guide Star (UK) table and create an ST table.
IMFLT    fits and removes a background intensity plane from an image
STFND    Task to find stars in an image and generate an ST table.
STRAN    Task compares ST tables, find image coordinates (e.g. guide star )
TVSTAR    Verb to plot star positions on top of a TV image
XTRAN    Create an image with transformed coordinates