In various instances, the surgical instrument can include a data storage protocol and/or at least one security feature. The surgical instrument can include a locking circuit, for example. In various instances, the surgical instrument can include sensors and/or magnets for detecting various characteristics of the surgical instrument, surgical operation, and/or surgical site. The surgical instrument can require a temporary access code for operating and/or can be selected for connection to an external display. A surgical system can include a first modular component, a second modular component, and a feedback system. The feedback system can include an engagement sensor, which can detect the engagement and/or degree of engagement of the first modular component and the second modular component.