Yeah, x86 is the most complex machine human invented! The Intel Architecture, a Complex Instruction Set Computer (CISC) is the top architecture in the world. Not only Intel Architecture been used in computer and server, it is slowly moving to the embedded world, including phones and tablets.
The infamous x86, or also known as IA32, can support 16 bits, 32 bits, and 64 bits operation! Not only that, the protection mode including segmentation and paging, in other words, double layers of protection.
IA32 also features operation for string operations, floating point operation, and the single instruction multiple data (SIMD) instruction. More advance chips even can be used as virtual machines.
So much for this ICM.