I did a job, rather the company I work for did a job down at Texas Instruments in Dallas around 1990. Everything is locked down tight as fuck. People joke about calculators but those fools have been doing classified work for the government for decades. Everyone that worked on that job had to have security clearance just to get to certain areas and perform work. Some weird things were going on down there. There was a pizza delivery driver that delivered pizzas down there to one of the buildings and the pizza delivery guy had to have security clearance.
When we started the job we had a guy spill a bottle of water on the floor that he had on top of a ladder. He climbed down and started cleaning up the water and the Texas Instruments people shut down the entire floor and kicked everyone out until it was cleaned to their specifications. I'm not even making this shit up. Texas Instruments has been responsible for revolutionizing the world in various ways. you ever heard of Jack Kilby?
That old guy was on the team that gave us integrated circuits. In other words, the entire computer/information age of technology was launched because of that old dudes work at Texas Instruments in 1958.
Jack St. Clair Kilby (November 8, 1923 – June 20, 2005) was an American electrical engineer who took part (along with Robert Noyce) in the realization of the first integrated circuit while working at Texas Instruments (TI) in 1958. He was awarded the Nobel Prize in Physics on December 10, 2000.[1] To congratulate him, American President Bill Clinton wrote, "You can take pride in the knowledge that your work will help to improve lives for generations to come."[2]
Anyway, most of the areas at Texas Instruments we couldn't even get near because of clearance and we had escorts everywhere. Pretty intense for a calculator company.