Hi Cindy! I'll answer what I can:

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>2. Word 2000 is an SDI like WordPad. (Does this sound like a step backwards to anyone else? Why did they do it this way?)

O2K works this way under 95, 98, and NT. MS did research that showed most people would try to Alt-Tab between documents.

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>3. Word 2000 does not have a "save as" for older formats like the Word95 format.

Yes, it does, but I believe it's an optional install.

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>4. A 16-bit sound card will not work under Win2000.

Prolly not. Stability was the number one priority under W2K. If this meant sacrificing compatability, then compatability suffered.