Which innovative architectural product, first commercially introduced in the 1950s, revolutionized modern building design by allowing for floor-to-ceiling glass walls in skyscrapers?

The world of architectural products has seen remarkable innovations that have transformed how buildings are designed and constructed. From revolutionary materials to iconic design elements, certain products have left an indelible mark on the industry. This trivia question focuses on a significant product design milestone that changed architectural practices worldwide. Test your knowledge about the evolution of architectural product design!

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Curtain wall systems
Reinforced concrete panels
Structural insulated panels (SIPs)
Prefabricated steel frameworks