A method for creating, editing and updating, verifying, and referencing a database of work, educational, and licensing histories of workers includes an internet service which provides a secure means for prospective employees to enter and record on a database a personal educational and job history covering any time period. Upon determining that a print job of the specified user is to be executed using a consumable of the same type as the consumable of which exhaustion has occurred, the job managing section inserts the print job of the specified user at an error pause point to cause the printer to perform printing of the print job of the specified user directly after resolution of the consumable exhaustion. With this configuration, the light emitting device has a good heat radiating characteristic and high mechanical strength. An upper end of the pipe is then forged and formed as an inlet pipe. Successive beams can be connected electrically in series to provide a continuous current path for resistive joule heating.