Multicore systems refer to computer processors that have multiple cores, or processing units, on a single chip. These systems allow for parallel processing, where tasks can be divided among the cores and executed simultaneously, leading to improved performance and efficiency. Multicore systems are commonly used in modern computing devices, including desktops, laptops, servers, and mobile devices, to handle multiple tasks simultaneously and enhance overall system performance. Researchers in this area focus on developing hardware and software solutions to optimize the performance, scalability, and energy efficiency of multicore systems. They also explore new architectures, algorithms, and programming models to harness the full potential of multicore processors in a wide range of applications.