Which company's researchers developed the first working multi-touch screen technology that recognized multiple points of contact simultaneously?

Touch screen technology revolutionized how we interact with devices, from smartphones to kiosks. This innovation transformed multiple industries and created entirely new product categories. While touchscreens seem ubiquitous now, their development has a fascinating history spanning several decades of research and development across different organizations. Test your knowledge about this groundbreaking invention that fundamentally changed product design across virtually every sector.

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Apple Inc. (for the original iPhone)
CERN (European Organization for Nuclear Research)
Xerox PARC (Palo Alto Research Center)
Bell Labs (AT&T)