Which mathematical software platform was the first to transition from a perpetual license model to a subscription-based model for educational users?

The landscape of mathematical software has dramatically shifted from one-time purchases to subscription models. This change has impacted how educators, researchers, and students access powerful computational tools. Understanding these market transformations helps predict future trends in educational technology and professional mathematics applications. Test your knowledge of how subscription models have transformed the mathematics software industry!

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Mathematica (Wolfram Research, 2012)
MATLAB (MathWorks, 2014)
Maple (Maplesoft, 2015)
SPSS (IBM, 2013)