**What is a process?** A process is *an independent, self-contained unit that contains the code and data necessary to execute a specific task or set of tasks.* **What does each process have to ensure isolation and security?** To ensure isolation and security, each process has *its own protected memory space.* **What two users can processes run as?** The two users that a process can run as are: 1. `root` - Privileged access. 2. `mobile` - Unprivileged access. **What user can some special daemons run as?** The user that some special daemons can run as is *`/usr/libexec/logd` as `logd`.* **What are the three things a process can belong to?** The three things a process can belong to are: 1. A Daemon. 2. An Agent. 3. An Application.