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             </section>
 
+            <section>
+                <section>
+                    <h2>Xous: System Design</h2>
+                    <aside class="notes">
+                        Xous is, currently, very much under development.  However, there has
+                        been a lot of planning.
+                    </aside>
+                </section>
+
+                <section>
+                    <h2>Xous: Memory Model</h2>
+                    <aside class="notes">
+                        Xous will base its memory model on the Rust borrow checker.  That is,
+                        shared memory will be used for IPC.  If one process wishes to get a
+                        response from another, it can pass pages via a mutable borrow.  If
+                        a process wishes to share pages across multiple process, then only an
+                        immutable borrow may be made, and the sharing process cannot access
+                        pages until all processes have returned the memory.
+
+                        A process can move memory into another, which for example is how
+                        process spawning works.  In such a case, memory is no longer available
+                        in the sending process.
+                    </aside>
+                </section>
+
+                <section>
+                    <h2>Xous: Missing Features</h2>
+                    <aside class="notes">
+                        Xous has no fork().  Instead it will have spawn().
+
+                        Shared libraries aren't available at the start, but may come later.
+                    </aside>
+                </section>
+            </section>
+
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