PPT Slide
Limit Sensor - a sensor which detects when hardware has reached a physical limite - e.g. when a robotic arm has driven a joint through full rotation after which continued motor drive will break the joint.
Linking (Dynamic or Static) - Linking is the process by which an executable image is assigned addresses for all function entry points, all global variables, and all constants which may be referenced by other software modules - these addresses can be statically assigned once and for all at a pre-determined offset in physical memory (static linking) or may be position independent such that only relative addresses are assigned until the module is loaded, at which time physical addresses are derived from the relative (dynamic linking).
Livelock - related to deadlock, this situation arises when a circular wait for resources evolves and an attempt to break the deadlock is made by having each requester drop their requests and then re-request them - if the requests are well synchronized, then the system may cycle between deadlock and dropping requests over and over.