I came across these while dumpster-diving on archive.org.
The NeXTSTEP 3 one is probably familiar to many here. The other two didn't return any hits when I searched the forum for their titles.
"NeXTSTEP Release 3: A Demonstration With Steve Jobs" (#1M5050) (
https://archive.org/details/nextstep-release-3)
"The Middle of the Road is the Most Dangerous Path: Choosing Technology for a Competitive Advantage" (#1M5049) (
https://archive.org/details/the-middle-of-the-road-is-the-most-dangerous-path)
"The Fourth Paradigm in Computing: Custom Application Development in the NeXTSTEP Object-Oriented Environment" (#1M5051) (
https://archive.org/details/the-fourth-paradigm)