Lucy Suchmanm’s research at Xerox truly began to involve the interaction between humans and machines. She believes that user behavior is not always based on the intentions involved or predictable in advance. She believes user actions stem from the environment and state they wish to use. Lucy believes that when using a printer (early PC), users do not need to follow the operating instructions step by step to print strictly, but can more intuitively help users improvise their needs. She hopes to encourage printer designers to pay more attention to user interaction and adaptability, emphasizing the importance of designing based on people’s actual behavior in practice.