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In computing, an address space defines a context in which an address makes sense.

That is, two addresses may be the same but refer to different things if they belong to different address spaces.

Some example address spaces include:

In the Linux kernel, address spaces include:

Kernel memory
User memory, accessed through copy_to_user(), copy_from_user and similar functions
I/O memory, accessed through readb(), writel(), memcpy_toio(), etc.

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Computer terminology

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Topics: Address Space, Addressability, Address Message, Address...

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Address Resolution ProtocolIn computer networking using the internet protocol suite, the Address Resolution Protocol is a method for finding a host's Ethernet ( MAC) address from its IP address. The sender broadcasts an ARP packet containing the Internet address of another host and	Address busAn address bus is (part of) a computer bus, used by CPUs or DMA-capable units for communicating the physical addresses of computer memory elements/locations that the requesting unit wants to access (read/write). The width of an address bus, along with the	Address bookAn address book is a book in which contact details (e. address, telephone number, e-mail address, fax number, mobile phone number) are kept. Details are normally stored in alphabetical order of people's names. The term also denotes software designed for t
Addressing scheme	Address space	Address pool
Address munging	Addressing mode	Address space layout randomization
Address (geography)	Address bar	Addressing LDS Leaders

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