A few trips through the time machine:

• 24 years of Windows package design.
• Boot screens through the ages
• Microsoft producivity applications through the decades. (Warning: Marketing video.) Many of the locations in the first part of that video are from Microsoft’s main campus. The ones I recognized are the brown building that opens the video, the cubicle at 0:12 (spot the anachronism), the office at 0:20, the bookshelf at 0:21, the hallway at 0:28, the mailroom at 0:29, and the new bookshelf at 0:41. But once he makes it to IT Director, they move to some fancy-dancy building, which Long Zheng identifies as the City Center Plaza building in Bellevue.
• Upgrading through every version of Windows starting from MS-DOS 5.0.
• Comparing every version of Internet Explorer.

In the Internet Explorer time machine video, I was struck by the remark, “Appearance-wise, very little had changed [in Internet Explorer 4] since IE3. Not much changed in terms of functionality, either.” In fact, Internet Explorer 4 was probably the most significant revision of Internet Explorer in its history, because that’s the version that completely replaced the old layout engine with a new one code-named Trident, the layout engine that continues to power Internet Explorer today. Another case of “When you change the insides, nobody notices.”