Abstract: A photoelectric sensor includes: a placement table configured to allow a workpiece to be placed thereon; a light projecting device including a light emitting element configured to emit light and a converging element configured to converge the light emitted from the light emitting element toward a detection area; and a light receiving device configured to receive the light passing through the detection area from the converging element at a position located on a same plane as the placement table in a direction along an optical axis of the light. The optical axis of the light projected from the light projecting device is set such that the light is incident in a direction perpendicular to an incident surface of the light receiving device and focused on the incident surface of the light receiving device.

Abstract: A delivery service management system utilizes a two-dimensional bar code having key information for specifying the source of a material and content information of this material and attached in a delivery service, a two-dimensional bar code having key information for specifying the source of an item obtained by processing the material and content information of the item and attached in a delivery service, and a two-dimensional bar code having key information for specifying a seller of the item and content information describing a selling condition of the item and attached in a delivery service. Every time a delivery service has occurred between the material system, the processing system, and the selling system, the key information and the content information are received from the two-dimensional bar code to a database. Delivery service information associated with a given source is fed back to the given source represented by the key information from a set of pieces of received information.

Abstract: A data service company comprises an integrated database (DB) in which various business data dispersively kept in each part in an apparel industry including plan, manufacture, and sales relating to a dress as a product and textile raw material as material is integrated and a host computer (integrated database management system) including a computer hardware and a software for retrieving data from the integrated DB in accordance with data service to be provided and for outputting data. There is formed a data service network in which the integrated DB of the data service company is provided as the nucleus, and a plurality of sales companies, that of apparel manufacturers, that of sewing companies and that of textile companies are connected to each other.