One was seeing their Cray. I forget which specific model it was. It was gray and mauve, and had the fountain with the logo on the unit that pumped the coolant. Monsanto had a dedicated computer room for it with glass walls so you could see it. The overall effect was to make a very strong impression that this was something very special.
Another thing that stuck in my mind was seeing their bio labs. These were long concrete hallways dug halfway into the ground, I assume to make climate control easier. They had row upon row of corn plans under artificial light. These were the labs that developed roundup ready seed. I had no idea at the time the significance of what I was seeing or how contentious it would be now.
Last thing I'll mention is when we were walking outside and he pointed out the separate building the CEO et all worked out of. It was literally a bunker with earthen birms and such around it. My grandpa bragged that it was built to be bombproof in case terrorists attacked the CEO. At the time I was somewhat mystified why anyone would bomb the CEO of a chemical company. I certainly understand why now.
But anyhow, it was a cool experience and seeing that Cray probably helped inspire my interest in learning to program later.
Edit:
Random other thing I'll mention is an email exchange from a mailing list back in the late 90s that focused on APL style languages. Someone told their story about how back during Cray's glory days they worked in a lab where he did interactive APL programming on a Cray machine. I can only imagine what that must have felt like at the time, typing arcane terse syntax into a prompt that would execute them shockingly fast.
As for APL, I haven't really got past an orientation in the language but it's held a total mystique to me since seeing this video circa 1975 [0] walking through the language with a Selectric teletype acting as a REPL, totally flipped my understanding of computer history, I assumed it was all punchcard programming back in the old black and white days xD (I am born 1990 for reference, trying to catch up with what happened before me)
[0] (30min) https://www.youtube.com/watch?v=_DTpQ4Kk2wA
Bring back the impractical, space-eating circular design! I don't care about space efficiency. It's supposed to look cool.
https://ichef.bbci.co.uk/news/976/cpsprodpb/6F80/production/...
https://www.bbc.com/news/world-asia-53147684
And they do have a snazzy coloured endcap...
https://s.yimg.com/uu/api/res/1.2/spVSO7_2vryY6neSXK1JfQ--~B...
https://www.engadget.com/japan-fugaku-supercomputer-01312169...
Well, a bunch of racks with green LEDs is more practical, cheap and functional, I guess.
I imagine there have been multiple cycles through the spectrum since then…
Tuning the band gap with a new material back then was difficult I think.
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1. It was on loan to the Computer History Museum from Myhrvold and returned to him in 2016. It's unclear whether he did re-loan it or if he's busily calculating the values of polynomials with it.² The Computer History Museum website makes it sound like it's currently on display but I can find no news stories about it going back to the museum.
2. Just kidding about him calculating polynomials—it's (I think) on display in the lobby of Intellectual Ventures.
https://cdn.britannica.com/11/23611-050-81E61C8A/Cray-1-supe...
So happy to be able to find a picture of the wirewrap inside: https://s-media-cache-ak0.pinimg.com/originals/e2/d2/47/e2d2...