diff --git a/talks-public/2018-09-25-iPres2018/2018-09-25-iPres2018.org b/talks-public/2018-09-25-iPres2018/2018-09-25-iPres2018.org
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+++ b/talks-public/2018-09-25-iPres2018/2018-09-25-iPres2018.org
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+#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
+#+TITLE: Identifiers for Digital Objects
+#+SUBTITLE: The Case of Software Source Code Preservation
+#+AUTHOR: Roberto Di Cosmo
+#+EMAIL: roberto@dicosmo.org @rdicosmo @swheritage
+#+BEAMER_HEADER: \date{September 25th, 2018}
+#+BEAMER_HEADER: \title[www.softwareheritage.org]{Identifiers for Digital Objects}
+#+BEAMER_HEADER: \author[Roberto Di Cosmo \hspace{5em} www.dicosmo.org]{{\bf Roberto Di Cosmo}, Morane Gruenpeter, Stefano Zacchiroli}
+# #+BEAMER_HEADER: \setbeameroption{show notes on second screen}
+#+BEAMER_HEADER: \setbeameroption{hide notes}
+#+KEYWORDS: software heritage legacy preservation knowledge mankind technology
+#+LATEX_HEADER: \usepackage{tcolorbox}
+#
+# prelude.org contains all the information needed to export the main beamer latex source
+# use prelude-toc.org to get the table of contents
+#
+
+#+INCLUDE: "../../common/modules/prelude-toc.org" :minlevel 1
+
+
+#+INCLUDE: "../../common/modules/169.org"
+
+# +LaTeX_CLASS_OPTIONS: [aspectratio=169,handout,xcolor=table]
+
+#+LATEX_HEADER: \usepackage{bbding}
+#+LATEX_HEADER: \DeclareUnicodeCharacter{66D}{\FiveStar}
+
+#
+# If you want to change the title logo it's here
+#
+# +BEAMER_HEADER: \titlegraphic{\includegraphics[width=0.7\textwidth]{SWH-logo}}
+
+# aspect ratio can be changed, but the slides need to be adapted
+# - compute a "resizing factor" for the images (macro for picblocks?)
+#
+# set the background image
+#
+# https://pacoup.com/2011/06/12/list-of-true-169-resolutions/
+#
+#+BEAMER_HEADER: \pgfdeclareimage[height=90mm,width=160mm]{bgd}{swh-world-169.png}
+#+BEAMER_HEADER: \setbeamertemplate{background}{\pgfuseimage{bgd}}
+
+** Source Code: /executable/ and /human readable/ knowledge
+#+INCLUDE: "../../common/modules/source-code-different-short.org::#thesourcecode" :only-contents t :minlevel 3
+#+BEAMER: \pause
+*** 
+    Len Shustek, CHM\hfill /“Source code provides a view into the mind of the designer.”/
+* Software is everywhere and nowhere                               :noexport:
+** Software is everywhere
+  :PROPERTIES:
+  :CUSTOM_ID: softwareispervasive
+  :END:
+   #+latex: \begin{center}
+   #+ATTR_LATEX: :width .5\linewidth
+file:software-center.pdf
+   #+latex: \end{center}
+#+BEGIN_EXPORT latex
+\note{If we look around us, we see software everywhere.\\[1em]
+It powers our industries, fuels innovation, mediates access to all digital information,
+and is a pillar of modern scientific research.\\[1em] % 
+%Our industry, our society, our own lives depend on software!\\[1em]
+Software in general, and Free and Open Source software in particular, is at the heart of our society.\\[1em]
+The Source code of this software embodies our collective knowledge, and is a growing part of our cultural heritage.\\
+%Now the question is: are we taking care of it?
+}
+#+END_EXPORT
+#+BEAMER: \pause
+*** At the heart of our society				:B_picblock:noexport:
+    :PROPERTIES:
+    :BEAMER_opt: pic=software-center.pdf, leftpic=true, width=.3\linewidth
+    :BEAMER_env: picblock
+    :END:
+    - /Powers/ industry
+    - /Fuels/ digital transformation
+    - /Mediates/ access to information
+    - /Essential/ for scientific research
+*** Source code is /special/                                       :noexport:
+    \hfill it is /executable/ and /human readable/ knowledge (an /all time new/)
+*** Source code is /executable/ and /human readable/ knowledge
+    \hfill a growing part of our /Cultural Heritage/
+* The Software Heritage initiative
+#+INCLUDE: "../../common/modules/swh-goals-oneslide-vertical.org::#goals" :minlevel 2
+** A principled infrastructure \hfill \url{http://bit.ly/swhpaper}
+   #+latex: \begin{center}
+   #+ATTR_LATEX: :width 0.5\linewidth
+   file:SWH-as-foundation-slim.png
+   #+latex: \end{center}
+   #+BEAMER: \pause
+   #+latex: \centering
+   #+ATTR_LATEX: :width \extblockscale{.7\linewidth}
+   file:growth.png
+   #+BEAMER: \pause
+*** Technology
+    :PROPERTIES:
+    :BEAMER_col: 0.34
+    :BEAMER_env: block
+    :END:
+    - transparency and FOSS
+    - replicas all the way down
+*** Content (billions!)
+    :PROPERTIES:
+    :BEAMER_col: 0.32
+    :BEAMER_env: block
+    :END:
+    - *intrinsic identifiers*
+    - facts and provenance
+*** Organization
+    :PROPERTIES:
+    :BEAMER_col: 0.33
+    :BEAMER_env: block
+    :END:
+    - non-profit
+    - multi-stakeholder
+* Looking for the right PIDs 
+  #+INCLUDE: "../../common/modules/swh-pids.org::#main" :only-contents t
+* Demo time
+** A "wayback machine" for software source code
+*** Identifiers in action
+       - *\url{http://archive.softwareheritage.org/browse}*
+* Conclusion
+** Conclusion \hfill @swheritage
+  #+BEAMER: \vspace{-1mm}
+*** 
+    - there are many systems of identifiers
+    - DIOs and IDOs cater to different needs
+    - IDOs enable *integrity* and *no middle man* properties *together*
+    - Software Heritage is using IDOs for billions of objects, *today*
+    - we believe IDOs are appropriate for most *digital born* content that has a *canonical* representation
+  #+BEAMER: \vspace{-1mm}
+*** Come in, we're open!
+    \url{www.softwareheritage.org} --- learn more \\
+    \url{www.softwareheritage.org/support/sponsors/} --- sponsoring info \\
+    \url{www.softwareheritage.org/support/partners} --- partners \\
+    \url{forge.softwareheritage.org} --- our own code
+    #+BEAMER: \vspace{-1mm} \flushright {\Huge Questions?} \vfill
diff --git a/talks-public/2018-09-25-iPres2018/Makefile b/talks-public/2018-09-25-iPres2018/Makefile
new file mode 100644
index 0000000..68fbee7
--- /dev/null
+++ b/talks-public/2018-09-25-iPres2018/Makefile
@@ -0,0 +1 @@
+include ../Makefile.slides
diff --git a/talks-public/2018-09-25-iPres2018/forcebeamermode.sty b/talks-public/2018-09-25-iPres2018/forcebeamermode.sty
new file mode 100644
index 0000000..cf5fd2f
--- /dev/null
+++ b/talks-public/2018-09-25-iPres2018/forcebeamermode.sty
@@ -0,0 +1,19 @@
+\newif\ifOnBeamerModeTransition
+\newcommand{\forcebeamerstart}{
+  \mode<handout>{%
+    \OnBeamerModeTransitiontrue%
+  }
+  \makeatletter
+  \gdef\beamer@currentmode{beamer}%
+  \makeatother
+}
+\newcommand{\forcebeamerend}{
+  \mode<beamer>{%
+    \ifOnBeamerModeTransition%
+    \OnBeamerModeTransitionfalse%
+    \makeatletter
+    \gdef\beamer@currentmode{handout}%
+    \makeatother
+    \fi%
+  }
+}
diff --git a/talks-public/2018-09-25-iPres2018/mixhandout.sty b/talks-public/2018-09-25-iPres2018/mixhandout.sty
new file mode 100644
index 0000000..c0b50b4
--- /dev/null
+++ b/talks-public/2018-09-25-iPres2018/mixhandout.sty
@@ -0,0 +1,18 @@
+# From: https://tex.stackexchange.com/questions/213986/how-to-include-in-beamer-handout-a-slide-exactly-as-it-appears-in-presentation
+\makeatletter
+\newif\ifOnBeamerModeTransition
+\newcommand{\slideselection}{1-}%
+\newenvironment{handoutframeselect}[1][1-]{%
+  \begingroup%
+  \mode<handout>{%
+    \gdef\beamer@currentmode{beamer}%
+    \OnBeamerModeTransitiontrue%
+    \renewcommand{\slideselection}{#1}}%
+}{%
+  \ifOnBeamerModeTransition%
+    \OnBeamerModeTransitionfalse%
+    \gdef\beamer@currentmode{handout}%
+  \fi%
+  \endgroup%
+}
+\makeatother
\ No newline at end of file