An enhanced series of SPARC chips introduced by Sun in 1995. UltraSPARC chips are 64-bit CPUs that run all 32-bit SPARC applications. The first dual core UltraSPARC came out in 2004, targeted at the midrange server market. A year later, Sun introduced the UltraSPARC T1, its first multicore and multithreaded CPU. An eight-core UltraSPARC T1 supports 32 threads of execution. See SPARC.