I wonder where the spray painted sign went: twitter.com/profgalloway/status/1229952158667288576/photo/1. As mentioned at officechai.com/startups/amazon-first-office/ and elsewhere, Jeff did all he could to save money, e.g. he made the desks himself from pieces of wood. Mentioned e.g. at youtu.be/J2xGBlT0cqY?t=345 from Video 4. "Jeff Bezos presentation at MIT (2002)".
Video 1. Amazon.com report by Computer Chronicles (1996) Source. Contains some good footage of their early storehouse.
Video 2. Jeff Bezos interview by Chuck Films (1997) Source. On the street, with a lot of car noise. CC BY-SA, nice.
Video 3. Order from Bulgaria by Jeff Bezos (2002) Source. Full video: Video 4. "Jeff Bezos presentation at MIT (2002)"
Video 4. Jeff Bezos presentation at MIT (2002) Source. Good talk:
Video 5. Jeff Bezos Revealed by Bloomberg (2015) Source.
Video 6. cosine by Jeff Bezos (2018) Source.
PDE mention in another video from 2009: youtu.be/TYwhIO-OXTs?t=118
Full original video from The Economic Club of Washington, D.C. (2018): youtu.be/zN1PyNwjHpc?t=1544
Bezos also told PDE stuff in interviews as early as 1999: archive.ph/a3zBK.
Bibliography:
  • archive.ph/ucSHN This is what it was like to work at Amazon 20 years ago (2015). Good annecdotes from the first offices.
Apparently posted to ba.jobs.offered Usenet newsgroup?
Jeff's email was bezos@netcom.com at the time.
First Amazon hire, wrote and led the team that wrote v1.
He looks like an older and more experienced dude compared to Bezos at the time.
Bibliography: . www.geekwire.com/2011/meet-shel-kaphan-amazoncom-employee-1/2/ also mentions that unlike California, there's no sales tax in the state of Washington, which is important for selling books.
Video 1. Shel Kaphan interview by Internet History Podcast (2015) Source.
Video 2. Amazon.com Continues to Grow by NBC 15 (2014) Source. Features short excerpt of filmed interview with Shel.
Figure 1. Shel Kaphan. Source. TODO year. Presumably more or less close to publishing date of source at 2020.