1995 年 32 巻 5 号 p. 284-289
In 1990, 5. 25 “mageneto-optical disk (MO) was released on the market, conforming to ISO standard. After that, 5.25 MO has been steadily growing up and doing a great deal as a file-server application for workstation so called auto-changer. On the other hand, right after 3.5” MO (230MB) following 128MB had been introduced, 3.5 “MR market has been rapidly becoming popular due to reasonable prices and inprovements of drive functions. The future status of 3.5” MO whose maket expantion is expected is mainly described including the technologies for higher recording density.