Raspberry Pi

Raspberry Pi is a series of small, affordable single-board computers developed in the United Kingdom by the Raspberry Pi Foundation. It is a credit card-sized computer that uses a microcontroller to run various operating systems and perform a variety of tasks, from basic computing tasks to complex projects in the fields of robotics, artificial intelligence, and Internet of Things (IoT). Raspberry Pi devices are popular among hobbyists, educators, and researchers for their low cost, versatility, and ease of use.

I am using a Raspberry Pi to create a smart home security system that can be controlled from my smartphone.
The school's computer science class is teaching programming concepts using Raspberry Pi devices.
The research team used a Raspberry Pi to collect environmental data from the field and transmit it to the lab for analysis.
I am building a retro gaming console using a Raspberry Pi and some vintage game controllers.