Electronic or computer hardware built from design information that could be copyrighted or licensed but has instead been made available for public use at no charge. Such information can include documentation, schematic diagrams, etc.

Software that is developed, tested, or improved through public collaboration and distributed with the idea that the must be shared with others, ensuring an open future collaboration. 

A certification mark owned by the Open Source Initiative (OSI). Developers of software can use the Open Source trademark if their distribution terms conform to the OSI's Open Source Definition. 

In a computing context, an open system is an open source operating system, typically composed of coordinated modular components from a number of sources and not reliant upon any proprietary elements.

A process by which a computer can gain access to a wireless network that uses the Wired Equivalent Privacy (WEP) protocol. With OSA, a computer equipped with a wireless modem can access any WEP network and receive files that are not encrypted.

A standard description or "reference model" for how messages should be transmitted between any two points in a telecommunication network. Its purpose is to guide product implementors so that their products will consistently work with other products. 

Ak.a. Common Test Platform (CTP),  is a set of specifications defining test methods for diverse components of computer and electronic systems to be marketed as complete products. 

An open-source standard for packaging and distributing software applications for virtual machines (VM).  An OVF package contains multiple files in a single directory. 

A file format for documents, spreadsheets and presentations that is intended for use with the 2007 and later versions of the Microsoft Office suite. It is freely available and can be implemented by anyone using a recent version of Windows.

Open-source software (OSS) is computer software with its source code made available and licensed with a license in which the copyright holder provides the rights to study, change and distribute the software to anyone and for any purpose. Open-source software is very often developed in a public, collaborative manner.

A free open source operating system based upon the Berkeley Software Distribution (BSD) for UNIX.

openDCIM, is a free, web based Data Center Infrastructure Management application. DCIM means many different things to many different people, and there is a multitude of commercial applications available. openDCIM provides complete physical inventory (asset tracking) of the data center Support for Multiple Rooms (Data Centers) Management of the three key elements of capacity management - space, power, and cooling.

A protocol that allows a server to tell network switches where to send packets. With OpenFlow, the packet-moving decisions are centralized, so that the network can be programmed independently of the individual switches and data center gear.

The computer industry's standard Application Program Interface (API) for defining 2-D and 3-D graphic images. OpenGL specifies a set of "commands" or immediately executed functions. 

A decentralized single sign-on authentication system for the Internet. The goal of the OpenID initiative is to allow users to log in at websites around the Internet with one ID, instead of having to create multiple unique accounts.

The first enterprise-grade network management platform developed under the open source model. It was designed to manage tens of thousands of devices from a single server as well as manage unlimited devices using a cluster of servers.