All modern Snap Servers include an
embedded operating system called GuardianOS. The GuardianOS is a
UNIX-like operating system based on the mainstream
Linux kernel, and is used on the Snap Server line of network-attached storage devices. Older models used the SnapOS, which is a heavily customized
BSD flavor. The SnapOS was originally created by Meridian Data for the Meridian Data Snap! Server, and shipped on products from May 1998 through February 2006. Quantum had shipped more than 90,000 Snap Servers as of December 31, 2001. , an estimated 150,000 Snap Servers had been sold. Many Snap Servers are visible operating on the open Internet, although it is generally more common for them to be deployed inside corporate intranets. ==History==