This document discusses laboratory information systems (LIS). It begins by defining an LIS as a healthcare software solution that processes, stores, and manages patient data related to laboratory processes and testing. It then describes how an LIS works, recording, managing, updating, and storing patient testing data for clinical and anatomic pathology laboratories. The document also outlines the core components of an LIS, including sample tracking, protocol execution, and storage organization. It discusses why LIS are important for modern laboratories, noting they are crucial for organization, accuracy, and collaboration.