X86
TYPE OF INSTRUCTION SET ARCHITECTURE
80x86; Intel 80x86; 8x86; 80786; X86-16; Intel 80786; Intel x86; IA 32; X-86; X86 pro; X86-based CPU; X86-based system; X86 based; X86 clone; X86 compatible; Intel-based CPU; Intel-based cpu; Intel 16; Intel compatible; Intel-compatible; Intel clone; X86 architecture; Accumulator eXtended; AL register; AH register; AX register; BX register; CX register; DX register; BH register; BL register; CL register; CH register; DH register; DL register; Base pointer; DS register; ES register; SS register; DI register; SI register; FS register; GS register; X86 registers; BP register; EAX register; EBX register; ECX register; EDX register; ESP register; EBP register; ESI register; EDI register; EIP register; RIP register; RFLAGS register; RAX register; RBX register; RCX register; RDX register; RSI register; RDI register; RBP register; RSP register; GDTR register; LDTR register; IDTR register; TR register; IP register; Source index; Destination index; IAPX 86 series; X86 microprocessor
and so cannot be subject to patent claims. The pre-586 subset of the x86 architecture is therefore fully open.