it do some simple tasks. This is aterrible definition, so here is another poor one IMO from Wikipedia:



Siri is a computer program that works as an intelligent personal assistant and knowledge navigator, part of Apple Inc.'s iOS, watchOS, and tvOS operating systems. The feature uses a natural language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of Web services. The software, both in its original version and as an iOS feature, adapts to the user's individual language usage and individual searches with continuing use, and returns results that are individualized. Siri was originally introduced as an iOS application available in the App Store by Siri Inc., which was acquired by Apple on April 28, 2010. Siri, Inc. had announced that their software would be available for BlackBerry and for phones running Android, but all development efforts for non-Apple platforms were cancelled after the acquisition by Apple. There are several accent and gender combinations for the voice of Siri.