Routing is the process of path selection in a network, such as a computer network or transportation network. Routing may also refer to: Route of administration, the path by which a drug, fluid, poison or other substance is brought into contact with the body Hollowing out an area of wood or plastic using a router (woodworking) National Routeing Guide, a guide to trains over the United Kingdom's rail network Routing (hydrology), a technique used to predict the changes in shape of a hydrograph ABA routing transit number, a bank code used in the United States Routing number (Canada) Weather routing In electronics and computer technologies : Routing (electronic design automation), a step in the design of printed circuit boards and integrated circuits The packet forwarding algorithm in a computer network The role of a router hardware in a computer network See also Forwarding (disambiguation) Route (disambiguation) Router (disambiguation) Rout Vehicle routing problem