uncached accelerated uncached accelerated, cache algorithm [1] [2] uncached attribute uncached accelerated blocks, incompletely gathered stores blocks, completely gathered attribute, support for buffer [1] [2] cache algorithm [1] [2] uncorrectable error detection, suppressed flag [1] [2] underflow (FP) unimplemented operation (FP) uniprocessor system [1] [2] arbitration rules unnaming, register useg space User mode address mapping operations useg space xuseg space UX, bit [1] [2]