The iMac is a 400Mhz G3, Special Edition DV model purchased in late 1999. After warranty expiration it was upgraded to an 80GB HD (from 12GB) and to 768MB RAM (from 512MB). Never have had a problem with this model and it still works just fine—still in mint condition. I am now trying to wipe my HD clean and reinstall OS X in preparation for sale before the Xmas holidays. Don't expect to get much for it, but it would still be good for some young kid just getting into computers. It has ran—ran because it was retired a year ago after upgrading to a new iMac—for quite some time on OS 10.2; the original OS was 9.1. I wanted to do a Clean Install in order to completely wipe off the HD, but this menu option never came up on the OS X install disk. I never thought I'd forget how to work my old, beloved iMac. But I know I'm missing something. Any ideas?