Identify: IBM memory

On 26 Jan 2012 at 17:05, Al Kossow wrote: Found the CHM photo of "Alice": http://www.computerhistory.org/collections/accession/102712000 http://www.computerhistory.org/collections/accession/102711999 Patents: 3,710,352 assigned to Micro-BIt Corporation, MBC was subsequently purchased by CDC. The EBAM presence in the hallway of ADL is explained by a May 28,1975 Computerworld article (via Google Books): "Control Data Corp. is conducting evaluation tests of a prototype of an Electron Beam Accessed Memory (Ebam) from Micro-Bit Corp. of Lexington, Mass. The unit, being tested on a Star 1B computer as a fast paging device, has a capacity of 1.2M bits distributed in nine parallel channels with 128K bits each and has an access time of 16 ?sec to any page, Micro-Bit said. The memory combines MOS technology with electron-beam access. The first Ebam product is scheduled to be introduced in mid-'76 and will have 18 parallel channels, each with a capacity of 4.2M bits for a total capacity of 75M bits, the firm said." The remainder of the article is about IBM's work in superconductivity, although no mention of Josephson is made. Evidently, as late as 1982, there were still papers being published on the subject. I guess the Williams tube survived longer than anyone thinks... --Chuck