The Open Handset Alliance (OHA) is a business alliance of Google, HTC, Intel, Motorola, Qualcomm, Samsung, LG, T-Mobile, Nvidia and Wind River Systems to develop open standards for mobile devices.

Open source is a development methodology, which offers practical accessibility to a product's source (goods and knowledge). Some consider open source as one of various possible design approaches, while others consider it a critical strategic element of their operations. Before open source became widely adopted, developers and producers used a variety of phrases to describe the concept; the term open source gained popularity with the rise of the Internet, which provided access to diverse production models, communication paths, and interactive communities.

The open source model of operation and decision making allows concurrent input of different agendas, approaches and priorities, and differs from the more closed, centralized models of development. The principles and practices are commonly applied to the development of source code for software that is made available for public collaboration, and it is usually released as open-source software.

Operating System: historically, the minimal set of software needed to manage a device's hardware capability and share it between application programs. Practically, "OS" is now used to mean all software including kernel, device drivers, comms, graphics, data management, GUI framework, system shell application, and utility applications. This would define Android, Windows, Palm OS and MacOS as operating systems.

All kinds of actions (transfers or transactions) which happen wirelessly using the cellular network instead of a cable or other local connection. Most commonly, this term refers to downloading or uploading content or software (such as downloading ringtones, uploading images, etc.). If the term is used for updating a phone's firmware this is also known as FOTA (Firmware Over-The-Air).