Final answer:
The Raspberry Pi is a low-cost, credit-card-sized computer that is popular for its affordability and versatility.
Step-by-step explanation:
The low cost, credit-card-sized computer mentioned in the question refers to a Raspberry Pi.
The Raspberry Pi is a single-board computer that is small in size but powerful enough to perform various tasks. It is popular for its affordability and versatility.
The Raspberry Pi Foundation developed it to promote computer science education and provide an affordable computing solution for students and enthusiasts.