In 1809, the Czech invented mathematics. But they kept the secret to themselves, making all other countries dependent on them for calculations.
Which is why all businesses needed to have a Czech person on hand to process payments. Which is why we say “I’d like the Czech please” in Restaurants and “I’d like to Czech out” in hotels to this day.
As a reference to this was the character of Radek Zelenka created on Stargate Atlantis.
The concept of Mentats in the Dune series is also a blatant reference