Abstract: An access control system and its method that can prevent access to read or write into a file, no matter what user right the access request source uses to attempt an unauthorized access. This invention uses a policy that access to a specific file is authorized only when it is made by a specific user using a specific program. In addition, the policy is registered in a policy file 200 and the access information hooked by a file I/O hook program 106 is transmitted through an inter-OS communication processor 108 to an access control program 110 for a security OS 104 in order to perform access control according to said policy.

Abstract: Sheet definition data stored in a sheet definition data managing apparatus is supplied when necessary to a sheet recognizing apparatus to reduce a configuration cost of a sheet definition database. A sheet recognizing system has: a sheet definition managing apparatus including a sheet definition data generating apparatus for generating sheet definition data representative of a relation between a data writing field of a sheet and the written data and a charge managing apparatus for claiming a charge in accordance with a use degree of the sheet definition data by a sheet recognizing and processing apparatus; a communication network for transmitting the sheet definition data managed by the sheet definition data managing apparatus to the sheet recognizing and processing apparatus; and a sheet recognizing apparatus for recognizing the type of the sheet by referring to the sheet definition data acquired via the network.

Abstract: Sheet definition data stored in a sheet definition data managing apparatus is supplied when necessary to a sheet recognizing apparatus to reduce a configuration cost of a sheet definition database. A sheet recognizing system has: a sheet definition managing apparatus including a sheet definition data generating apparatus for generating sheet definition data representative of a relation between a data writing field of a sheet and the written data and a charge managing apparatus for claiming a charge in accordance with a use degree of the sheet definition data by a sheet recognizing and processing apparatus; a communication network for transmitting the sheet definition data managed by the sheet definition data managing apparatus to the sheet recognizing and processing apparatus; and a sheet recognizing apparatus for recognizing the type of the sheet by referring to the sheet definition data acquired via the network.

Abstract: An access control system and its method that can prevent access to read or write into a file, no matter what user right the access request source uses to attempt an unauthorized access. This invention uses a policy that access to a specific file is authorized only when it is made by a specific user using a specific program. In addition, the policy is registered in a policy file 200 and the access information hooked by a file I/O hook program 106 is transmitted through an inter-OS communication processor 108 to an access control program 110 for a security OS 104 in order to perform access control according to said policy.

Abstract: A detachable built-in printer for printing print data supplied from a computer has at least an interface controller for interfacing with the computer, a print pattern generator, a printing unit, and a printer controller for controlling the whole operation of the printer, respectively assembled on a PC card in conformity with PCMCIA/JEIDA. A computer system with a detachable built-in printer is configured by a computer with a PC card slot and the detachable built-in printer inserted into the PC card slot. It is therefore possible to realize a printer capable of being detachably connected to and built in a computer, and a computer system with such a built-in and removable printer.

Abstract: An apparatus for shading a polyhedron at high speed is disclosed which includes the combination of a polygon-scan line conversion processor and an inner product interpolation processor for obtaining a pair of inner products of vectors indicative of a relation among the direction of a normal, the direction of a light source and the direction of a view point each viewed at a point within a polygon having a plurality of vertices, on the basis of the position of said point in the polygon and the direction of a normal at each of the vertices, a table searched on the basis of the inner products of vectors and holding a series of brightness data which have previously been calculated for a series of values of each of the inner products of vectors, a buffer for storing the result of table search for the above table, and a D/A conversion circuit for converting the result of table search into a signal which is used as a brightness control signal in a display device.