I

I/O
   piping
   problems with tape drives
   redirection [1] [2]
IGI
   described
image restoration
   maximum entropy method
   preparing image
   signal-to-noise ratio
image
   combining resolutions
   deconvolution
   directory, imdir
   displaying
   edge
   format, imtype
   GEIS format
   group syntax [1] [2]
   header keyword descriptors
   imtype
   IRAF OIF format
   multigroup format, described [1] [2]
   multigroup format, working with
   pixel manipulation
   plotting values in
   printing hardcopy
   registration and alignment
   restoring blurred
   rotating
   saturated pixels
   section syntax [1] [2] [3]
   troubleshooting problems
   type, imtype environment variable
images package
   described
images
   formats
   imdir
   imtype [1] [2]
   troubleshooting
   types [1] [2]
imcopy task
imdir [1] [2]
IMFORT
   Fortran interface
imgscale task
imgtools package
   described
imheader task
implot task
imtype
   setting environment variable
input focus
installation
   help
   troubleshooting
instrument graph tables
   in synphot
interactive curve fitting
Interactive Graphics Interpreter
   described
inverse Fourier transform
IPPPSSOOT file name
IPPPSSOOT file names
IRAF
   home directory
   image format
   logicals
   networking
   pixel file location, imdir
   platforms supported
   setup
   startup file (login.cl)
   STSDAS relationship
   terminal types
irafhosts file
   networking
iraftape account
   conflicting multiple users
isophote fitting
   column labels
   isophote package
   stop conditions
isoplot task