It is more or less exactly this. Texas Instruments invests in extensive marketing aimed at teachers, school districts, and university math departments. They get

It is more or less exactly this. Texas Instruments invests in extensive marketing aimed at teachers, school districts, and university math departments. They get a lot of free teacher training and materials centered around TI calculators, to induce them to require all new students to buy a $100+ Texas Instruments graphing calculator every year. - https://gen.medium.com/big-calculator-how-texas-instruments-monopolized-math-class-67ee165045dc https://gen.medium.com/big-calculator-how-texas-instruments-... - https://www.google.com/search?q=texas+instruments+marketing+to+schools https://www.google.com/search?q=texas+instruments+marketing+...