The Solaris Operating System is a Unix-based operating system developed by Sun Microsystems. It is known for its scalability, reliability, and advanced features, making it suitable for enterprise environments. Solaris supports a variety of hardware platforms and is often used in servers and workstations. One of the key features of Solaris is its support for ZFS, a high-performance file system that offers data integrity and efficient storage management. Additionally, Solaris includes built-in tools for virtualization and resource management, allowing users to optimize system performance and manage workloads effectively.