diff --git a/common/modules/source-code-different-short.org b/common/modules/source-code-different-short.org
index 304f721..6ab7baf 100644
--- a/common/modules/source-code-different-short.org
+++ b/common/modules/source-code-different-short.org
@@ -1,103 +1,103 @@
 #+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
 #
 # Software is all around us
 #
 #+INCLUDE: "prelude.org" :minlevel 1
 * Software source code
   :PROPERTIES:
   :CUSTOM_ID: main
   :END:
 ** Source code matters!
   :PROPERTIES:
   :CUSTOM_ID: thesourcecode
   :END:
 #+BEGIN_EXPORT latex
   \begin{minipage}[c]{\extblockscale{.1\linewidth}}%
   \includegraphics[width=\linewidth]{software.png}%
   \end{minipage}  
   \begin{minipage}[c]{.975\linewidth-\extblockscale{.1\linewidth}}%
   \begin{quote}
   “The source code for a work means the preferred form of the work for making modifications to it." \hfill GPL Licence
   \end{quote}
   \end{minipage}  
 #+END_EXPORT
 #+Beamer: \pause
 *** 
     :PROPERTIES:
     :BEAMER_env: block
     :BEAMER_act: +-
     :END:
 #+latex:    \begin{center} Hello World \end{center}
 *** Program (excerpt of binary) 			      :B_block:BMCOL:
     :PROPERTIES:
     :BEAMER_col: 0.5
     :BEAMER_env: block
     :BEAMER_act: +-
     :END:
 #+begin_src hex :exports code
   4004e6: 55             
   4004e7: 48 89 e5       
   4004ea: bf 84 05 40 00 
   4004ef: b8 00 00 00 00 
   4004f4: e8 c7 fe ff ff 
   4004f9: 90             
   4004fa: 5d             
   4004fb: c3             
 #+end_src
 *** Program (source code) 				      :B_block:BMCOL:
     :PROPERTIES:
     :BEAMER_col: 0.55
     :BEAMER_env: block
     :BEAMER_act: +-
     :END:
 
 #+begin_src c :exports code
 /* Hello World program */
 
 #include<stdio.h>
 
 void main()
 {
     printf("Hello World");
 }
 #+end_src
 ** Software source code is /special/
   :PROPERTIES:
   :CUSTOM_ID: softwareisdifferent
   :END:
 *** Harold Abelson, Structure and Interpretation of Computer Programs
     /“Programs must be written for people to read, and only incidentally for machines to execute.”/
 
-*** Quake 2 source code (excerpt)			      :B_block:BMCOL:
+*** Quake III source code (excerpt)                           :B_block:BMCOL:
     :PROPERTIES:
     :BEAMER_col: 0.45
     :BEAMER_env: block
     :END:
    #+LATEX: \includegraphics[width=\linewidth]{quake-carmack-sqrt-1.png}
    # smart efficient implementation of 1/sqrt(x) on a CPU without special support
 *** Net. queue in Linux (excerpt)                             :B_block:BMCOL:
     :PROPERTIES:
     :BEAMER_col: 0.45
     :BEAMER_env: block
     :END:
    #+LATEX: \includegraphics[width=\linewidth]{juliusz-sfb-short.png}
    # Juliusz implementation of stochastic fair blue in the Linux Kernel linux/net/sched/sch_sfb.c
 
 *** 							    :B_ignoreheading:
     :PROPERTIES:
     :BEAMER_env: ignoreheading
     :END:
 *** Len Shustek, Computer History Museum
     \hfill /“Source code provides a view into the mind of the designer.”/
    
 *** Distinguishing features					   :noexport:
     - /executable/ and /human readable/ knowledge (an /all time new/)
       + even hardware is... software! (VHDL, FPGA, ...)
       + /text files are forever/
     - naturally /evolves/ over time
       + the /development history/ is key to its /understanding/
     - complex: large /web of dependencies/, millions of SLOCs
 *** In a word							   :noexport:
     - software /is not just another/ sequence of bits
     - a software archive /is not just another/ digital archive