This document discusses automated storage and retrieval systems (ASRS), which are computer-controlled systems for automatically placing and retrieving loads from defined storage locations. ASRS allow high-density storage in both horizontal and vertical directions, providing fast retrieval times. Common types of ASRS include vertical lift modules, horizontal carousels, vertical lift robots, and mini-load systems. ASRS provide advantages like optimized inventory management, increased storage capacity, and improved productivity and order fulfillment times.