1. (a unit of information equal to 1000 zettabytes or 10^24 bytes) jottabajt, YB synonim: YB2. (a unit of information equal to 1024 zebibytes or 2^80 bytes) jottabajt, jobibajt, YB, YiB: : synonim: yobibytesynonim: YBsynonim: YiB