Siri
Siri was originally released as a stand-alone application for the iOS operating system in February 2010, and at the time, the developers were also intending to release Siri for Android and BlackBerry devices. Two months later, Apple acquired Siri. On October 4, 2011, Apple introduced the iPhone 4S with a beta version of Siri. After the announcement, Apple removed the existing standalone Siri app from App Store. "TechCrunch" wrote that, despite the Siri app's support for iPhone 4, its removal from App Store might also have had a financial aspect for the company, in providing an incentive for customers to upgrade devices. Third-party developer Steven Troughton-Smith, however, managed to port Siri to iPhone 4, though without being able to communicate with Apple's servers. A few days later, Troughton-Smith, working with an anonymous person nicknamed "Chpwn", managed to fully hack Siri, enabling its full functionalities on iPhone 4 and iPod Touch devices. Additionally, developers were also able to successfully create and distribute legal ports of Siri to any device capable of running iOS 5, though a proxy server was required for Apple server interaction.
Over the years, Apple has expanded the line of officially supported products, including newer iPhone models, as well as iPad support in June 2012, iPod Touch support in September 2012, Apple TV support, and the stand-alone Siri Remote, in September 2015, Mac and AirPods support in September 2016, and HomePod support in February 2018.
John Sculley
After Jobs left, the company experienced a turnaround in 1986; one journalist wrote "since Sculley joined the company … many things have changed", and that his "strategy has worked". Wozniak credited the Macintosh's initial success to Sculley, saying that he "worked to build a Macintosh market when the Apple II went away". Apple introduced a faster microprocessor and renamed "The Macintosh Office" to "Desktop Publishing." Under the direction of Sculley, who had learned several painful lessons after introducing the bulky Macintosh Portable in 1989, Apple introduced the PowerBook in 1991. The same year, Apple introduced System 7, a major upgrade to the operating system, which added color to the interface and introduced new networking capabilities. It remained the architectural basis for Mac OS until 2001, when the classic Mac OS was replaced by Mac OS X. The success of the PowerBook and other products brought increasing revenue. For some time, it appeared that Apple could do no wrong, introducing fresh new products and generating increasing profits in the process. The magazine "MacAddict" named the period between 1989 and 1991 as the "first golden age" of the Macintosh.