Abstract: User authentication information for network of a user and a name of a server to be accessed are sent from a client terminal to a user management equipment realized by one of servers which constitute a network system. The user management equipment sends the network address of that server and user authentication information registered for that server back to the client terminal. Using these pieces of information, the client terminal logs in that server. Each of the servers used by the user notifies the user management equipment of the actual accounts for the user at preferable times. Using the notified information, the user management equipment manages the actual accounts of each user. Each user can know the total of actual accounts for the servers used by accessing only the user management equipment.

Abstract: In an inking apparatus for use in a printing machine having an ink pot and a plurality of juxtaposed ink metering keys and adjusting means for moving the ink metering keys toward and away from the peripheral surface of an inking roller in contact with the ink contained in the ink pot, there are provided center supporting keys on both sides of the ink metering key located at the axial center of the inking roller, and adjusting means for reciprocating the center supporting keys toward and away from the periphery of the inking roller independently of the ink metering keys.

Abstract: A process for producing acrylic acid or methacrylic acid by reacting acetic acid or propionic acid with formaldehyde in a gas phase is described, characterized by carrying out the reaction in the presence of a solid catalyst containing at least one of boron oxide or phosphorus oxide and having an acid site of an acid strength, pKa.ltoreq.-3.0. The solid catalyst is of high activity and is satisfactory in both selectivity and conversion and, furthermore, its high selectivity can be maintained for long periods of time. Thus the desired product, acrylic acid or methacrylic acid, can be produced in high yield.