Which retail innovation first allowed customers to purchase graphing calculators through a subscription model with automatic software updates?

In the world of mathematics education and products, retail innovations have transformed how mathematical tools and learning materials are marketed and sold. From ancient counting devices to modern digital solutions, the presentation and packaging of mathematical products has evolved dramatically. This poll tests your knowledge about a significant retail innovation that revolutionized the accessibility of mathematical tools for students and professionals alike.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Texas Instruments' Education Technology subscription service launched in 2017
Casio's Calculator-as-a-Service program introduced in 2015
HP Prime Mobile subscription model released in 2014
Desmos' premium calculator subscription launched in 2016