The correct answer is "smart phones."
Explanation:
1. Steve Jobs was the co-founder of Apple Inc.
2. Apple Inc. is a technology company that is well-known for popularizing and revolutionizing the smartphone industry with the introduction of the iPhone.
3. Smartphones are mobile devices that combine features of a traditional cell phone with those of a computer, offering functions like internet browsing, email, apps, and more.
4. The innovation and success of the iPhone under Steve Jobs' leadership played a significant role in popularizing and shaping the modern smartphone market.