The tech industry has been struggling with diversity and inclusion for decades. In the mid-1980s, women made up a significant proportion of the tech industry. However, by the end of the decade, their numbers had declined dramatically. What factors contributed to this decline, and how does it affect product development? In this talk, we'll explore the various factors that played a role in the disappearance of women from the tech scene in the mid-1980s. We'll examine the cultural and societal biases that existed at the time, the lack of support and mentorship that women received, and the impact of technological changes on the representation of women in tech. We'll also discuss the impact that the disappearance of women in tech has on product development. Research has shown that diverse teams lead to better products, but when women are underrepresented, this can lead to blind spots and biases that affect the final product. We'll explore the ways in which diversity and inclusion can improve product development and how we can work to create more inclusive teams.