What are Exabytes, Zettabytes, Yottabytes, and Brontobytes?
by 
Egao No Genki
ANSWERS: 2
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A bit is a single binary digit, zero or one. A byte is eight bits. A kilobyte is 1024 bytes. A megabyte is 1024 kilobytes which is 1048576 bytes. A gigabyte is 1024 megabytes which is about 1.07 * 10^9 bytes. A terabyte is 1024 gigabytes which is about 1.10 * 10^12 bytes. A petabyte is 1024 terabytes which is about 1.13 * 10^15 bytes. An exabyte is 1024 petabytes which is about 1.15 * 10^18 bytes. A zettabyte is 1024 exabytes which is about 1.18 * 10^21 bytes. A yottabyte is 1024 zettabytes which is about 1.21 * 10^24 bytes. A brontobyte is 1024 yottabytes which is about 1.24 * 10^27 bytes. Most of these come from the SI unit prefixes, only adapted to be powers of two, so they are round numbers in binary, which is more suitable for computers. (Occasionally, confusingly, powers of 1000 are used instead of 1024).
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I don't believe a brontobyte is officially defined. For the others, the above definition applies to computer memory (RAM). Disk storage is in powers of ten, and so A megabyte is 1,000 kilobytes and so on until A yottabyte is 1,000 zettabytes
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