Important to note that DOS, one of the popular platforms in the 80s, didn't have linear address space. NEAR, FAR and LONG pointers could be constructed that two

Important to note that DOS, one of the popular platforms in the 80s, didn't have linear address space. NEAR, FAR and LONG pointers could be constructed that two equal values would point to different locations in memory and two distinct values would point to the same object.