Matick, Pleshko, Sie and Terman1 have described the thick-film read only store (TFROS), a semipermanent storage device utilizing changeable cards containing permanent magnets as the storage medium. The purpose of these magnets is to provide a saturating field for the film bit locations in the TFROS. The intention of this Communication is to describe briefly the process used to obtain these magnets and the way they are utilized in the TFROS. The required magnetic properties are covered in Ref. 1 and will not be discussed in detail in this Communication.
Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.