i've only had the...er..."pleasure" of being left alone to fend for myself at a computer with IRAF once. Last summer my boss was showing me the very basics of IRAF, we were trying to flat field an image in IRAF because we weren't sure if our image was messed up or if the program we were using was messed up. So he left me w/ that and after I figured out I had no idea what I was doing i just played around with the image a bit and spent the remainder of the day renaming files (mine of course, nothing important either, we just deleted them afterwards) :-D fun right? thank god for Photom II!

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Cold be hand and heart and bone
Cold be travellers far from home
They do not see what lies ahead
When sun has failed and moon is dead