A portable terminal has a memory having a program stored thereon and readably by a computer. The program causes the portable terminal to perform searching an image processing apparatus capable of executing an image processing operation by a first method, determining whether the image processing apparatus is detected in the searching by the first method, searching the image processing apparatus by a second method in a case where it is determined that the image processing apparatus is not detected as a result of the searching by the first method, storing apparatus information for identifying the image processing apparatus detected in the searching by the first method or the searching by the second method, and transmitting operation instruction information for instructing execution of the image processing operation to the image processing apparatus identified with the designated apparatus information stored.