Specifically, the 32-bit version of the x86 instruction set architecture. / (rare) Specifically, the original, 16-bit version of the x86 instruction set architecture.

(computing) The 32-bit version of the x86 instruction set architecture.

(computing) The original 16-bit-only version of the x86 instruction set architecture.

Alternative spelling of x86-64

(computing) A superset of the x86 instruction set architecture, providing additional support for 64-bit addressing while remaining mostly backward compatible with older applications.