Which packaging innovation, introduced in the 1970s, revolutionized dictionary design by allowing users to quickly access specific letter sections without flipping through numerous pages?

The packaging design of dictionaries and language reference materials has evolved significantly over the decades, reflecting changes in both publishing technologies and consumer preferences. From heavy leather-bound tomes to sleek digital interfaces, these designs tell a story about how we value and interact with language resources. Test your knowledge about a revolutionary packaging innovation that changed how we access language references.

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Thumb indexes (cut-out tabs on page edges)
Color-coded section dividers
Spiral binding with section markers
Detachable alphabetical reference cards