Final answer:
Digital Assistants are smart devices that respond to verbal commands to perform tasks or provide answers, leveraging technologies like the internet, GPS, and voice activation. Significant advancements such as the transistor and the integrated circuit have fueled the digital computer revolution.
Step-by-step explanation:
The smart devices that respond to a user's verbal commands by using search technology to provide an answer to a question or perform a task are known as Digital Assistants. These assistants can learn from their users, make suggestions, and facilitate interactions with others and the world. The invention of the transistor and later the integrated circuit played pivotal roles in the evolution of digital computers, allowing for the efficient processing of large amounts of data and embarking on what is known as the modern computer revolution. Digital assistants leverage a range of technologies such as the internet, cell tower networks, GPS, and voice activation, many of which were developed with significant government support including GPS by the U.S. Department of Defense.
Digital computers have changed drastically from their early large and exclusive origins to the more compact and accessible devices we have today, thanks to advances in technology like the integrated circuit, which replaced the need for complicated wiring and vacuum tubes.