diff --git a/talks/scheme-2016/talk.20160918.pdf b/talks/scheme-2016/talk.20160918.pdf
new file mode 100644
index 0000000..ea61465
Binary files /dev/null and b/talks/scheme-2016/talk.20160918.pdf differ
diff --git a/talks/scheme-2016/talk.20160918.pdf.asc b/talks/scheme-2016/talk.20160918.pdf.asc
new file mode 100644
index 0000000..d64adb4
--- /dev/null
+++ b/talks/scheme-2016/talk.20160918.pdf.asc
@@ -0,0 +1,17 @@
+-----BEGIN PGP SIGNATURE-----
+Version: GnuPG v2
+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+=1lCY
+-----END PGP SIGNATURE-----