1The discovery of penicillin marked the incunabula of modern antibiotic therapy.
2Historians often study the incunabula of a social movement to understand its underlying causes and motivations.
3The Renaissance humanists saw themselves as reviving the incunabula of classical Greek and Roman culture.
4The incunabula of the digital age were marked by the development of the first personal computers and the internet.
5Scholars of book history often focus on the incunabula of printing, examining the early experiments with movable type and the spread of literacy.