This is a list of major active social networking websites and excludes dating websites (see Comparison of online dating websites).
For defunct social networking websites, see List of defunct social networking websites.
) is the collection of techniques, skills, methods and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation.
Technology can be the knowledge of techniques, processes, etc.
or it can be embedded in machines, computers, devices and factories, which can be operated by individuals without detailed knowledge of the workings of such things.
The human species' use of technology began with the conversion of natural resources into simple tools.
The prehistoric discovery of how to control fire and the later Neolithic Revolution increased the available sources of food and the invention of the wheel helped humans to travel in and control their environment.
Developments in historic times, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale.
The steady progress of military technology has brought weapons of ever-increasing destructive power, from clubs to nuclear weapons. It has helped develop more advanced economies (including today's global economy) and has allowed the rise of a leisure class.
Many technological processes produce unwanted by-products, known as pollution, and deplete natural resources, to the detriment of Earth's environment.
Various implementations of technology influence the values of a society and new technology often raises new ethical questions.