1.  exabyte(n = noun.quantity) eb - a unit of information equal to 1000 petabytes or 10^18 bytes;
is a kind of computer memory unit
is a part of zb, zettabyte
has parts: pb, petabyte

2.  exabyte(n = noun.quantity) eb, eib, exbibyte - a unit of information equal to 1024 pebibytes or 2^60 bytes;
is a kind of computer memory unit
is a part of zb, zebibyte, zettabyte, zib
has parts: pb, pebibyte, petabyte, pib