EDO RAM recognizes that most of the time when the CPU requests memory for a particular address, it will want some more addresses nearby.
Extended Data Out Random Access Memory.
Extended Data Output (Memory)
Extended Data Out RAM. A type of DRAM that can be 10% to 20% faster than normal DRAM if no external cache is used. EDO keeps its chip output buffer open longer and can begin to access more data even before its done reading the previous data. Not much of a speed increase is noticed over Fast Page Mode RAM if an external cache of 256K is present. Controller must be compatible or it will act like normal DRAM.