Douglas Trumbull, noted SFX guy.
Some of his credits:
- “2001: A Space Odyssey”
- “Close Encounters of the Third Kind”
- “Blade Runner”
- “The Andromeda Strain”
- “Silent Running” (director/effects)
- “Brainstorm” (director)
He also did effects and was an executive producer on “The Starlost“, and did effects for the first movie based on a minor SF TV series from the 1960s.
I can’t find it online now (I tried both DuckDuckGo and Bing) but I have a vivid memory of an advertisement in the late 70s/early 80s, possibly in “Scientific American”, featuring Douglas Trumbull endorsing HP calculators. When the time came, that was a big motivator for me to go the RPN route.