Hitachi provides IT services that address customers' diverse needs throughout the entire lifecycle of systems ranging from consulting to system integration, operation, maintenance and support. These solutions and products fuse Hitachi's extensive expertise in a diverse range of business fields including financial services that leverage advanced information technology.
Founded in 1975, Microsoft (Nasdaq "MSFT") is a devices and services company focused on delivering technologies to market that will transform the computing ecosystem and help businesses worldwide take advantage of mobile, enterprise social, and cloud computing trends to drive growth. Microsoft’s Cloud OS vision enables you to move to the cloud on your terms; getting the most value from your existing IT investments while giving you the flexibility to respond quickly to changing business needs. Microsoft is committed to promoting industry-level innovation and customer choice by delivering interoperable and standards-based solutions, with the goal of optimizing applications in private and hybrid cloud computing models, letting you focus on what’s most important: accelerating your business.
Open Source specific Google is a proud user and supporter of open source software and development methodologies. Google contributes back to the Open Source community in many ways, including more than 35 million lines of source code, project hosting on Google Code, programs for students including Google Summer of Code and the Google Code-in Contest, and support for a wide variety of projects, organizations, and events around the world.developers.google.com/
Citrix supports the open source community via developer support and evangelism. We have a number of developers and evangelists that participate actively in the open source community in Apache Cloudstack, OpenDaylight, Xen Project and XenServer. We also conduct educational activities via the Build A Cloud events held all over the world. For more information, please visit: http://open.citrix.com.