Which product design innovation by Bible publishers in the 1980s led to a significant increase in sales among younger readers?

Religious texts are among the oldest published works in human history, but they're also big business in modern times. From ancient scriptures to contemporary spiritual guides, the marketing and distribution of religious texts involves sophisticated product design, branding strategies, and market research. This poll examines how religious publishers have adapted traditional texts for modern markets while maintaining their sacred essence.

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Study Bibles with contextual notes and commentary
Youth-oriented Bibles with contemporary language and relevant teen issues addressed in sidebars
Illustrated Bibles with classical religious artwork
Digital Bibles available on early personal computers