Lillian Gilbreth and Ada Lovelace are both important to study to about in IXD history because of their significant contributions to the field.

Lillian played a key role in making technology and work environments more user-friendly. By combining scientific management and psychology, she helped develop ideas that are central to human-computer interaction (HCI) today, particularly user-centered design. Her work on ergonomics led to creating tools and spaces that enhance accessibility and improve the overall experience for workers. She focused on understanding the needs of all employees, including women and people with disabilities. This approach still matters today, as it emphasizes creating designs that are effective but also kind and inclusive.

Ada Lovelace laid the groundwork for how we see technology augmenting human capabilities. Her work with the Analytical Engine showed that machines could do more than just calculations; they could engage in creative activities, which is an important idea in interaction design. Lovelace’s thoughts on programming, such as conditional branching and code reuse, align well with modern design principles that prioritize user involvement and flexibility.