| 翻訳と辞書 |
| Foto-Mem FM 390 ： ウィキペディア英語版 |
Foto-Mem
Foto-Mem Inc. was a US company that attempted to introduce very large computer memory systems based on optical storage on microfiche cards. An alternate product line based on the same mechanical systems allowed a single microfiche card to be displayed on multiple workstations, intended for large libraries where a single card might be used by several people at once. Only one such system was ever delivered, a microfiche reader for the ''New York Times''; this system was never successful and the company failed as a result.
==FM 390==
The company was formed on May 5, 1967 by James Laura, who considered himself primarily a financial consultant, but had some experience in computers.〔(Hoffman vs Estabrook & Co., Inc.; 587 F.2d 509 (1st Cir. 1978) )〕 His idea was to use existing microfiche systems to develop a computer memory system with a "multi-billion bit capacity", a concept IBM had recently introduced in a more complex and less-standard fashion as the IBM 1360 ''Photostore''. The 1360 used custom film "chips" packed into custom boxes used with custom hardware to move and file them. In comparison, the Foto-Mem concept would use standard microfiche ISO A5 (105 x 148 mm) cards, using a laser to read and write the cards instead of the Photostore's complex electron-beam writer. Additionally the mechanical systems were developed for other purposes by a 3rd party, Mosler, who sold a sorting system known as the Selectriever. By combining the two technologies, Laura could develop a highly competitive device for costs well below the Photostore.
In January 1968 he hired Albert Eng to run development of the system Laura had sketched out, now known as the FM 390. The 390 consisted of two main parts, the reader/writer on top, and the store and retrieval system under it. Together they formed a single two-part cabinet about the size of a large drum printer. The "Foto-Data Cards" used to store data were standard A5 microfiche, but punched along one edge to allow them to be mechanically sorted. The Cards were packed into "Foto-Data Cell"s, each containing 100 cards (IBM used similar terminology). Each 390 stored up to 250 Cells, for a combined total of "1 to 3 billions bits of information".〔(FM 390 Series ) - sales brochure〕 The only available reference suggests this was the storage capacity of a single Cell, but this seems unlikely. Several additional storage units could be added to the base FM 390 to increase total storage.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Foto-Mem」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|