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OSR 2 Last modified: Saturday, April 12, 1997

Short for OEM Service Release 2, a new version of Windows 95 released at the end of 1996. Also called Windows 95b, OSR 2 provides a number of new features and bug fixes. Probably the most important new feature is FAT32, a new version of the file allocation table. FAT32 supports disk drives up to 2 terabytes and yields better storage efficiency due to smaller clusters. OSR 2 is only available bundled in new computers. You cannot obtain it as an upgrade to older versions of Windows 95.

Microsoft Knowledge Base article on OSR2 This article describes Windows 95 OEM Service Release 2 (OSR2). OSR 2 compatibility problems This TechWire news article, from February 21, 1996, reports on compatibility problems that are showing up in the latest OEM release of Microsoft's Windows 95 operating system.