Siri (pronounced / ˈ s ɪr i / SIRR-ee) is a virtual assistant that is part of Apple Inc.'s iOS, iPadOS, watchOS, macOS, and tvOS operating systems. The assistant uses voice queries and a natural-language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of Internet services.

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Siri Recognises Basic Voice Commands When Offline in iOS 11.2 Nov 16, 2017 Siri, Alexa Targeted as EU Probes ‘Internet of Things’