from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An area of a disk having information for loading the operating system that is needed to start a computer.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A dedicated block usually at the beginning (first block on first track) of a storage medium that holds special data used to start a system. Some systems use a boot block of several physical sectors, while some use only one boot sector. Other manufacturers use the terms boot block and boot sector interchangeably.


boot + block (Wiktionary)


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