OS 3.5/3.9 is definitely more than a bunch of 'patches'. Improved support for graphics cards, built-in CDROM support, Iomega tools, Hd support >4Gb, 68060 recognition, new icon set, improved datatypes, mpeg support, the list goes on and on. Plus you get a built in TCP/IP stack, email and browser clients so you can get the Ami on-line no sweat. Anachronism Industries' eBay shop has boxed 3.5 packages for only $22.00 and you can get 3.9 CDs from many dealers for around $40.00. That's an incredibly small price to pay to modernizing the machine's OS.