https://www.computerhistory.org/tdih/

Excellent! https://www.fastcompany.com/40435064/what-alan-kay-thinks-about-the-iphone-and-technology-now https://twitter.com/khoitsma/status/1041412147962687488

In a paper published July 26, 2018 in Astronomy & Astrophysics, a team of researchers reports the observation of a hallmark of general relativity known as gravitational redshift. The measurement is the first time general relativity has been confirmed in the region near a supermassive black hole.

“World Brains” “Excel 4.0 Introduced March 25, 1992”