Since 1969 MACH has been providing selective blanket order services for distinguished academic libraries, . Advised by a professional librarian, at the MLS level, MACH selects the books according to the instructions given by the client. The bimonthly MACH BOOKLIST describes the books selected for one or more clients. The books sent on blanket order have a progressive discounts and are not charged packing and mailing costs. MACH is offering this service to other type of libraries.