A computer system which enables more efficient use of a storage system shared by plural host computers and optimizes the performance of the whole system including the host computers and storages. A force distribution function is excellently performed when an external impact is applied to the air mattress according to the present invention, so that a distortion phenomenon of the product is prevented. Each bank comprises of memory cells. Also the invention provides baked products in which the mixture defined above has been incorporated. In the event the sensed torque is below the minimum, the escalator can be shut down to prevent restart until the failure condition is corrected. In preferred embodiments actually built and tested by Applicants digital information has been transmitted at rates of 1.