I find internal company memos highly interesting in terms of their impact on the organization as well as a great learning source. Here's a compilation of a few unique internal company memos. I'm always on the lookout for new/unique memos; if you have a suggestion, feel free to send me a note.
Jeff Bezos Day One letter of 1997
Day 2 is stasis. Followed by irrelevance. Followed by excruciating, painful decline. Followed by death. And that is why it is always Day 1.
To be sure, this kind of decline would happen in extreme slow motion. An established company might harvest Day 2 for decades, but the final result would still come.
Bill Gates' Internet Tidal Wave Memo
Bill Gates' memo, "The Internet Tidal Wave," to all Microsoft executive staff, where he makes clear his intention to focus the company's efforts online with immediate effect and "assign the Internet the highest level of importance," calling it, "the most important single development to come along since the IBM PC was introduced in 1981."
Google's Larry Page & Sergey Brin write very founders' letter, 2004
Google is not a conventional company. We do not intend to become one. Throughout Google’s evolution as a privately held company, we have managed Google differently. We have also emphasized an atmosphere of creativity and challenge, which has helped us provide unbiased, accurate and free access to information for those who rely on us around the world.