Space on a rack available for rackmount servers.
Found on http://www.glossarycentral.com/website_hosting/rackspace.html


Rackspace US, Inc. ({nyse|RAX}) is an IT hosting company based in San Antonio, Texas. The company also has offices in Australia, the United Kingdom, The Netherlands and Hong Kong, and data centers operating in Texas, Illinois, Virginia, the United Kingdom, and Hong Kong as of late 2008. The company`s email and apps division operates in Blacksburg.
Found on http://en.wikipedia.org/wiki/Rackspace
No exact match found