Since you did not read the following articles, I will quote some relevant parts.

Originally posted by Sam Hobbs (me)
LIM 4.0 Expanded Memory Boards/Drivers for Basic 7.0
That says (excerpts):
There is, however, an older standard for accessing memory above 1 MB which is called expanded memory. It uses a protocol called the Expanded Memory Specification or EMS.

EMS was originally created to overcome the 1 MB addressing limitations of the first generation 8088 and 8086 CPUs.

To use EMS, a special adapter board was added to the PC containing additional memory and hardware switching circuits.
Originally posted by Sam Hobbs (me)
Expanded Memory (EMS)
The first paragraph says:
Listed below are some memory boards/drivers that are within the specifications of the LIM 4.0 EMS (Lotus-Intel-Microsoft version 4.0 Expanded Memory Specification) standard for MS-DOS. One list below is for 80386 computers, and the other list is for 80286 computers.
Notice it says "memory boards" and "80286 computers"!