D


data base
   table functions
data file
   described [1] [2]
   formats
   HST data set
   sample data
data types
   declaring
   GEIS files
   parameters
deallocate command
deconvolution
   algorithms
DecWindows
   input focus
default
   image type
   parameters, restoring
   printer
delaytime task
describe command
detector efficiency
   FOC
dev$graphcap file
dev$pix file
dev$tapecap file
dev$termcap file
devices command
devstatus command
directory
   for IRAF pixel files
   specifying [1] [2]
   user parameters (uparm)
disk space
   /tmp
display task
   groups and sections
   using
display
   troubleshooting problems
displays
   input focus
documentation
   obtaining
   user [1] [2]
documents
   obtaining [1] [2]