Definition

1. Noun:
   • A unit of digital information storage: "zb" is a symbol representing a very large unit of data measurement. It has two primary definitions based on different standards.
   • In binary (base-2) systems: A "zb" (zebibyte) equals 1,024 exbibytes, or 2^70 (1,180,591,620,717,411,303,424) bytes. This definition is used in contexts involving computer architecture and memory.
   • In decimal (base-10) systems: A "zb" (zettabyte) equals 1,000 exabytes, or 10^21 (1,000,000,000,000,000,000,000) bytes. This definition is commonly used in data storage, networking, and by storage device manufacturers.

Usage Examples

• Noun:
  • The total global data is estimated to reach several zettabytes (zb) by 2025.
  • The server's total addressable memory is measured in zebibytes (zb).
  • A single zb of storage is required for the new research archive.

Advanced Usage

• Context is critical: The meaning of "zb" must be interpreted from the context. In scientific computing, it often means zebibyte (2^70 bytes). In commercial data storage and telecommunications, it typically means zettabyte (10^21 bytes).
• Formal distinction: To avoid confusion, the International Electrotechnical Commission (IEC) standard recommends "ZiB" for zebibyte (binary) and reserves "ZB" for zettabyte (decimal). However, "zb" is often used informally for both.

Variants and Related Words

• Zettabyte (ZB): The decimal unit equal to 10^21 bytes.
• Zebibyte (ZiB): The binary unit equal to 2^70 bytes.
• Exabyte (EB): A unit 1,000 times smaller than a zettabyte (or 1,024 times smaller than a zebibyte).
• Yottabyte (YB): A unit 1,000 times larger than a zettabyte.

Synonyms

• Zettabyte (for the decimal meaning).
• Zebibyte (for the binary meaning).

Related Phrases

• ZBps: Zettabytes per second (a data transfer rate).
• ZiBps: Zebibytes per second (a data transfer rate).

Noun

1. a unit of information equal to 1024 exbibytes or 2^70 bytes
2. a unit of information equal to 1000 exabytes or 10^21 bytes
3. a unit of information equal to 1000 exabits or 10^21 bits