+* Figure out PD/PT management API.
+ - We should document what's in mmu.h.
+ - pagedir.[ch] is undocumented.
+
+* Write, test VM.
+
+* Implement `jitter'.
+
+* Test list, hash ADTs.
+
+* Compile and install gdb, dbg versions.
+ - Test gdb version.
+
+* References/bibliography.
+ - Userprog refers to [SysV-i386].
+
+* Write "tour".
+
+----------------------------------------------------------------------