Which mathematical software product pioneered the concept of 'notebook interface' that combines executable code, visualization, and documentation in a single document?

The landscape of mathematics education and professional work has been transformed by specialized software tools over the decades. These products have changed how we teach, learn, and apply mathematical concepts across industries. This trivia question explores a pivotal moment in the product development history of one of the most influential mathematical software packages that helped democratize complex computational mathematics.

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Mathematica (launched 1988)
MATLAB (launched 1984)
Maple (launched 1982)
R (launched 1993)