Further, Japanese Unexamined Patent Publication No. 148290/2000 (Tokukai 2000-148290)(Publication date: May 26, 2000) discloses a technique such that: the HMD and a display watch are employed as the display device, and devices such as a control device containing a CPU, a memory device etc. containing a memory and an HD are connected to each other via a connection clip which connects micro conducto