Abstract: A server of a job opportunity registrant management system includes, as its functions: a registration information acceptance module that accepts registration information for employment for a business operator, and registers a registrant (first registrant) belonging to the business operator, a registrant (second registrant) belonging to a managing entity, and a registrant (third registrant) not belonging to a specific business operator or managing entity, with attributes different from each other; a job offering information acceptance module that accepts job offering information from the business operator; and a job offering information presentation module that presents, to the registrant, the job offering information with respect to the attribute of the registrant to whom the job offering information is provided.

Abstract: A server 20 of a shift adjustment system 1 includes, as functions thereof: a shift information reception module 2033 that receives entry information on a preferred shift from an inside employee employed by a business operator or an outside person with experience; a shift information presentation module 2034 that presents the business operator with the shift information that is distinguished by inside employee, outside person with experience, and outside job applicant; and a selection module 2036 that receives entry information for the business operator referring to job application information to select a job applicant to actually work.