diff --git a/TO_DO b/TO_DO
index df1aff2bf..6fad4d76d 100644
--- a/TO_DO
+++ b/TO_DO
@@ -7,6 +7,22 @@ BEFORE 4.4:
 - reports from Nicos.
 - fix ensure_loaded/1.
 
+STK:
+- move architecture #ifdef's out of C files.
+- collapse windows and POSIX makefile recipes.
+- inline c_interface functions (static #included?)
+- look for a system regexp library before using the one in Yap.
+- see why tag2.pl is not compiling.
+- readline is installed on thor, but is not "found" by configure and
+  is not working when manually forced in. (missing symbols, maybe because
+  there is no libtermcap.a?)
+- make docs/Makefile configurable.
+- break up yap.tex.
+- start devel.tex.
+- should sigactions be executed when Yap is waiting at the prompt?
+- see if on_signal/3 works through the C interface as well.
+
+
 TO CHECK:
 - bad register allocation for a(X,Y) :- X is Y+2.3 ?