H
HDR$
header file
described [1] [2]
editing contents
examining
location for IRAF image
select based on keyword
headers package
described [1] [2]
help command
help data base
rebuilding
help
on-line help system in IRAF
hfilter task
hidden parameters
High Speed Photometer
aperture location
described
instrument health
polarimetry calibration
histogram task
history
command line, editing
home directory
IRAF
HotSeat
hrs package [1] [2]
hsp package [1] [2]
HST data tape
files in HST data set
whatxd5 s on?
hstpos task
hst_calib package
hsubtract task