Solaris is a commercial Unix operating system sold by Oracle, previously (before 2010) from Sun Microsystems. It can run on SPARC or x86 hardware.
Solaris is a Unix operating system originally developed by Sun Microsystems as a successor to SunOS. Oracle Solaris, as it is now known, has been owned by Oracle Corporation since Oracle's acquisition of Sun in January 2010. OpenSolaris (the open-source version of Solaris) was abandoned at that point.
Solaris is known for its scalability, especially on SPARC systems (sparc), and for originating many innovative features such as DTrace, ZFS and Time Slider. Solaris supports SPARC-based and x86-based workstations and servers from Sun and other vendors.