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+---
+layout: wiki
+title: SystemDoc
+permalink: /wiki/SystemDoc/
+---
+
+System Documentation for Developers
+===================================
+
+The System Architecture Specification
+-------------------------------------
+
+-   Qubes OS Architecture v0.3 [​(pdf)](http://www.qubes-os.org/files/doc/arch-spec-0.3.pdf) [​(sig)](http://www.qubes-os.org/files/doc/arch-spec-0.3.pdf.sig)
+