Abstract: The disclosed is a method comprising the steps of displaying entirely a plurality of storehouse facilities in the form of a plan view; informing a storage abnormality when the actual storage location and stock condition are different from that displayed in parallel with displaying the stock condition at each instant; and correcting the stock condition at the time the storage abnormality is informed. Shelves are distinguished using displayed figures in accordance with shelves in which already stored, shelves still remaining empty, and shelves for which storage is prevented; and the stock condition of the storehouse facilities is displayed by specifying any of the facility on the displayed surface.

Abstract: A SQUID fluxmeter, which object is to accurately measure magnetic flux even if the input magnetic flux is largely changed in a short time, includes an 1-input superconducting OR gate for outputting pulses to the number of i in response to one input pulse from a SQUID, an AC bias current source for outputting a current I.sub.C of variable frequency 4if to a bias input node of the OR gate, an up/down counter for counting pulses from the SQUID and a control circuit for outputting a control signal CSi to the AC bias current source corresponding to the time differential value of the count value C1 of the counter and present value i. The response speed of the magnetic flux feedback through the feedback coil to the SQUID in response to the magnetic flux input to the SQUID is thereby made i times higher than that in the prior art.