Which product design innovation revolutionized mathematical software by introducing dynamic visualization that allowed users to manipulate geometric constructions in real-time?

Mathematical software has transformed how educators teach, researchers work, and students learn mathematics. From the early days of specialized calculators to today's sophisticated modeling tools, product design in this field has continually evolved to meet user needs. This poll tests your knowledge about a pivotal product design innovation that changed how users interact with mathematical concepts and visualizations.

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Geometer's Sketchpad's constraint-based interactive geometry system (1991)
Mathematica's computational notebook interface (1988)
MATLAB's matrix-based programming environment (1984)
Maple's symbolic mathematics engine (1982)