Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 136,286 pages of information and 219,020 images on early companies, their products and the people who designed and built them.
Magnetic Peripherals Inc., originally a joint venture with Honeywell and Honeywell Bull, became a major player in the hard disk drive market. It was the worldwide leader in 14 inch disk drive technology in the OEM marketplace in the 1970s and early 1980s especially with its SMD (Storage Module Device) and CMD (Cartridge Module Drive), with its plant at Brynmawr in the South Wales valleys running 24/7 production. 
1983 The expansion to Brynmawr in Gwent created 150 new jobs.