x86 memory segmentation refers to the implementation of memory segmentation on the x86 architecture. Certain portions of the memory may be addressed by a single index register without changing a 16-bit segment selector. In real mode or V86 mode, a segment is always 65,536 bytes in size (using 16-bit offsets). In protected mode, a segment can have variable length. Segments can overlap.
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“What has kept the world safe from the bomb since 1945 has not been deterrence, in the sense of fear of specific weapons, so much as it’s been memory. The memory of what happened at Hiroshima.”
—John Hersey (b. 1914)