A satellite system, also known as a satellite rack or satellite cart system, is a high-density storage solution used in warehouses and distribution centers. It typically operates in conjunction with a pallet racking system. The system consists of satellite carts or shuttles that run on rails or tracks within the racking structure. These shuttles can move laterally or vertically to access and transport pallets within the racking system. Satellite systems enable deep-lane storage, as multiple pallets can be stored in each lane, and the shuttles can efficiently handle their movement.

A shuttle system, such as an automatic pallet shuttle or radio shuttle system, is an automated storage and retrieval system used to optimize the handling and storage of palletized goods. It typically operates in selective racking systems. The shuttle system consists of a motorized shuttle device that runs on rails or tracks within the racking. The shuttle can move horizontally along the depth of the racking, carrying and transporting pallets. It provides automated storage and retrieval, enabling high-density storage and efficient pallet handling.