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Disk I/O (e.g. IRAF files)

IRAFDIRDescribe IRAF images on specified directory
IRAFRDRead a disk IRAF image file into IDL variables.
IRAFWRTWrite IDL image and header to an IRAF (.pix & .imh) file
READ_FMRRead a journal (ApJ, AJ) machine-readable table into IDL
WFPC2_READRead a Wide Field/Planetary Camera 2 (WFPC2) image