Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 709)

Change: In 1966 Peripheral Systems Corp was formed by Memorex to pursue the key to disk system opportunity but it was soon redirected to a 2311   View changes from previous version. (Word count: 709)

Change: First commercially significant non-IBM disk drive, in that its This shipment marks the beginning of the independent disk drive suppliers who today dominate the industry [Note 1]. The Memorex 630 was “plug compatible” with the IBM 2311 (quadruple capacity of the IBM 1311) in that it   View changes from previous version. (Word count: 643)

Change: The first non-IBM disk drive was the Bryant 4000 series, circa 1961. and there were other captive and independent manufactures in the 1960s but the   View changes from previous version. (Word count: 645)

Change: key to disk system opportunity but it was soon redirected to a 2311 plug compatible disk drive development.. The initial development contemplated a hydraulic actuator like the 2311, but after Roy Applequist joined Memorex   View changes from previous version. (Word count: 566)

Change: System/360 computers thru the IBM 2841 Storage Control Unit. It's disk packs were interchangeableinterchangeable, that is, “media compatible” with packs written on the IBM 2311 (“media compatible”).2311. Discussion It is rumored that Memorex decided to enter the plug   View changes from previous version. (Word count: 551)

Change: capacity version, the Memorex 660. Additional information Oral History of Roy ApplequistUS Patent 3,544,980, Magnetic Recording Disc Drive With Head Positioning And Collision Avoidance Apparatus, Applequist et alMemorex Corporate History Timeline Edited by:Moderator: T. Gardner October 4, 2007 Contributors: T Gardner, J Richards   View changes from previous version. (Word count: 517)

Change: Moved by rondennison Nov 12 2007, 7:04 PM EST

Change:  It is rumored that Memorex decided to enter the plug compatible disk drive business when IBM refused to give a volume discount on the IBM   View changes from previous version. (Word count: 518)