From MorphOS Library
Which - Searches the command path for a particular item
FILE/A, NOALIAS/S, ALIAS/S, NORES/S, RES/S, ALL/S
FILE - Name of the command, program or directory to find NOALIAS - Switch: Do not search the alias list ALIAS - Switch: Only search the alias list NORES - Switch: Do no search the resident list RES - Switch: Only search the resident list ALL - Continues the search through the full search path, find and list all locations of a command or program. May lead to multiple listings of the same command if that command is reached by more than one route (such as C: and the current directory).
MorphOS:> Which devlist MorphOS:MorphOS/C/DevList