The county auditor shall be the chief administrator of the county automatic data processing board and may employ a deputy who shall serve under his direction. The auditor or his deputy shall supervise the operation of the automatic data processing center. Subject to approval by the board, the administrator shall employ such other persons as are necessary for the operation of the center and shall fix the compensation of the deputy and all such employees. Salaries and expenses of the center shall be paid from funds budgeted and appropriated to the board by the board of county commissioners. The administrator may adopt such rules and regulations as are necessary for the operation of the center.