Donor wrote, "Such hard drives typically utilize miniature devices that detect magnetic signals, called sliders. Such sliders were manufactured by National Micronetics, and others, as illustrated here." Included with artificat is a business card of "Robert T. Sturrock," "Design Engineering Manager," Micronetics Division," "NATIONAL MICRONETICS, INC.," "West Hurley, N.Y. 12491." On the container is a mailing label, from "NATIONAL MICRONETICS, INC." and to "DAN ROSE ASSOCIATES."