OpenStep User Interface Guidelines

While looking at Nextspace, a desktop environment that brings a NeXTSTEP look and feel to Linux, I saw a link to the OpenStep Interface Guidelines PDF.

I am weirdly nostalgic for this era of computing and the interface advancements made during this time. There were some incredibly smart people figuring out a lot of the paradigms that we are familiar with (that we can't seem to replicate today).