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+# Theory
+
+This chapter describes various concepts which are used in the Linux kernel.
+
+* [Paging](http://0xax.gitbooks.io/linux-insides/content/Theory/Paging.html)
+* [Elf64 format](http://0xax.gitbooks.io/linux-insides/content/Theory/ELF.html)
+* [Per-CPU variables](http://0xax.gitbooks.io/linux-insides/content/Theory/per-cpu.html)