To keep a student intern in the field of computer science application development busy, you can assign them real-world projects that align with their skills and interests. This could include tasks such as coding new features, debugging existing code, or researching and implementing new technologies. Additionally, providing opportunities for the intern to shadow experienced developers, attend meetings, and participate in code reviews can help keep them engaged and learning. It's also important to regularly check in with the intern to ensure they have a good balance of challenging and achievable tasks. **

The noun for "to be busy" in the sense of being occupied and not having business is "busyness." It refers to the state of being busy or occupied with various activities or tasks. "Busyness" is often used to describe a hectic or active period where one is fully engaged in different responsibilities or commitments. **

The noun for "to be occupied" in the sense of being busy and not having business dealings is "occupation." It refers to the state of being busy or engaged in activities that require one's time and attention, typically not related to work or business transactions. **

The noun for "to be busy" in the sense of being occupied and not having business dealings is "busyness." It refers to the state of being engaged in activities that occupy one's time and attention, without necessarily involving business transactions. "Busyness" can describe a state of constant activity or preoccupation with tasks, responsibilities, or commitments. **