, which enables hardware acceleration for network packet processing to increase throughput. Storage & Management: Features the Microsoft Management Console (MMC) 3.0

The original Windows Server 2003 (RTM) launched in April 2003. , released in December 2005, was not a full OS overhaul but an update that added several key features without altering the core kernel. R2 included:

Old MSDN (now Visual Studio) subscriptions used to include Server 2003 ISOs. While new subscriptions don’t offer it, subscribers with ancient keys can sometimes still access the download.