We talk about constraints, especially temporal and enabling constraints in complexity theory, how complex systems remember their past and what we can learn from boundaries in complex systems for APIs. Our guest is Professor Alicia Juarrero, a leading complexity theory philosopher and academic, as well as the founder and president of VectorAnalytica, a technology company that specializes in large scale scientific data capture and real time analysis tools. Alicia's work in complexity theory is widely quoted by thought leaders in the technology space and referenced in many recent complexity-informed approaches for managing highly dynamic systems, as well as in knowledge management.