Question: What did Marie Curie discover? Answer: Marie Curie studied the radiation of all compounds containing the known radioactive elements, including uranium and thorium, which she later discovered was also radioactive.
A couple of final limits related to virtual memory are the maximum size and number of paging files supported by Windows. 32-bit Windows has a maximum paging file size of 16TB (4GB if you for some reason run in non-PAE mode) and 64-bit Windows can having paging files that are up to 16TB in size on x64 and 32TB on IA64.
Extended memory was introduced in the Intel 80286 processor, increasing the amount of addressable memory beyond what was introduced in the similarly named expanded memory (EMS). Prior to XMS, expanded memory was used to increase the 640KB upper limit of DOS to 1MB using a gated memory card riser. Extended memory initially boosted the addressable memory to 16MB. XMS 2.0 extended the capacity to 64GB and XMS 3.0 to up to 4GB. Beyond XMS 3.0, AMD64, the de facto x86-64 standard, expands maximum memory to 256TB. Programs written to use expanded memory would be redirected by driver emulation to use extended memoryâs upper memory area instead.