With that being said, there is something warm-feeling and even whimsical about the classic Mac OS and classic beige Macs. I truly think the Apple Human Interface Guidelines of the 1990s were well written and are timeless recommendations for making great, usable software. I believe designers of today's user-facing software tools should acquaint themselves with a classic Mac running contemporary programs like Microsoft Word 5.1 and the ClarisWorks suite to see great examples of well-designed software. I also like both the System 7 and Platinum themes, with a slight preference toward Platinum. I'm really curious about A/UX, which married the classic Mac OS and Unix, and I'm also curious about Rhapsody, a predecessor to Mac OS X that was based on NeXTSTEP but featured the Platinum theme from Mac OS 8.