1 files changed, 181 insertions, 181 deletions
diff --git a/tex/context/base/supp-box.mkiv b/tex/context/base/supp-box.mkiv
index 97c93c7bf..0e3f95492 100644
--- a/tex/context/base/supp-box.mkiv
+++ b/tex/context/base/supp-box.mkiv
@@ -104,30 +104,30 @@
 \newcount\c_boxes_register
 
 \unexpanded\def\smashbox
-  {\afterassignment\boxes_smash_boxes_register\c_boxes_register}
+  {\afterassignment\syst_boxes_smash_boxes_register\c_boxes_register}
 
-\def\boxes_smash_boxes_register
+\def\syst_boxes_smash_boxes_register
   {\wd\c_boxes_register\zeropoint
    \ht\c_boxes_register\zeropoint
    \dp\c_boxes_register\zeropoint}
 
 \unexpanded\def\hsmashbox
-  {\afterassignment\boxes_hsmashed_boxes_register\c_boxes_register}
+  {\afterassignment\syst_boxes_hsmashed_boxes_register\c_boxes_register}
 
-\def\boxes_hsmashed_boxes_register
+\def\syst_boxes_hsmashed_boxes_register
   {\wd\c_boxes_register\zeropoint}
 
 \unexpanded\def\vsmashbox
-  {\afterassignment\boxes_vsmashed_boxes_register\c_boxes_register}
+  {\afterassignment\syst_boxes_vsmashed_boxes_register\c_boxes_register}
 
-\def\boxes_vsmashed_boxes_register
+\def\syst_boxes_vsmashed_boxes_register
   {\ht\c_boxes_register\zeropoint
    \dp\c_boxes_register\zeropoint}
 
 \unexpanded\def\smashedbox
-  {\afterassignment\boxes_smashed_boxes_register\c_boxes_register}
+  {\afterassignment\syst_boxes_smashed_boxes_register\c_boxes_register}
 
-\unexpanded\def\boxes_smashed_boxes_register
+\unexpanded\def\syst_boxes_smashed_boxes_register
   {\wd\c_boxes_register\zeropoint
    \ht\c_boxes_register\zeropoint
    \dp\c_boxes_register\zeropoint
@@ -142,23 +142,23 @@
 %D and smashed alternatives. The later ones reduce all
 %D dimensions to zero.
 
-\unexpanded\def\hsmash  {\bgroup\dowithnextboxcs\boxes_hsmashed_nextbox\normalhbox}
-\unexpanded\def\vsmash  {\bgroup\dowithnextboxcs\boxes_vsmashed_nextbox\normalvbox}
-\unexpanded\def\hsmashed{\bgroup\dowithnextboxcs\boxes_smashed_nextbox \normalhbox}
-\unexpanded\def\vsmashed{\bgroup\dowithnextboxcs\boxes_smashed_nextbox \normalvbox}
+\unexpanded\def\hsmash  {\bgroup\dowithnextboxcs\syst_boxes_hsmashed_nextbox\normalhbox}
+\unexpanded\def\vsmash  {\bgroup\dowithnextboxcs\syst_boxes_vsmashed_nextbox\normalvbox}
+\unexpanded\def\hsmashed{\bgroup\dowithnextboxcs\syst_boxes_smashed_nextbox \normalhbox}
+\unexpanded\def\vsmashed{\bgroup\dowithnextboxcs\syst_boxes_smashed_nextbox \normalvbox}
 
-\unexpanded\def\boxes_hsmashed_nextbox
+\unexpanded\def\syst_boxes_hsmashed_nextbox
   {\wd\nextbox\zeropoint
    \box\nextbox
    \egroup}
 
-\unexpanded\def\boxes_vsmashed_nextbox
+\unexpanded\def\syst_boxes_vsmashed_nextbox
   {\ht\nextbox\zeropoint
    \dp\nextbox\zeropoint
    \box\nextbox
    \egroup}
 
-\unexpanded\def\boxes_smashed_nextbox
+\unexpanded\def\syst_boxes_smashed_nextbox
   {\ht\nextbox\zeropoint
    \dp\nextbox\zeropoint
    \wd\nextbox\zeropoint
@@ -175,15 +175,15 @@
 %D \smashedvbox to ... {...}
 %D \stoptyping
 
-\unexpanded\def\smashedhbox{\normalhbox\bgroup\dowithnextboxcs\boxes_smashed_nextbox\normalhbox}
-\unexpanded\def\smashedvbox{\normalvbox\bgroup\dowithnextboxcs\boxes_smashed_nextbox\normalvbox}
+\unexpanded\def\smashedhbox{\normalhbox\bgroup\dowithnextboxcs\syst_boxes_smashed_nextbox\normalhbox}
+\unexpanded\def\smashedvbox{\normalvbox\bgroup\dowithnextboxcs\syst_boxes_smashed_nextbox\normalvbox}
 
 %D First we define a helper. We use a \LUATEX\ feature in order to avoid
 %D mathpalettes.
 
 \newcount\c_boxes_math_style
 
-\unexpanded\def\boxes_math_set_nextbox#1%
+\unexpanded\def\syst_boxes_math_set_nextbox#1%
   {\c_boxes_math_style\mathstyle
    \setbox\nextbox\normalhbox{$\mathsurround\zeropoint\triggermathstyle\c_boxes_math_style{#1}$}}
 
@@ -197,58 +197,58 @@
 
 \unexpanded\def\smash
   {\begingroup
-   \futurelet\nexttoken\boxes_smash}
+   \futurelet\nexttoken\syst_boxes_smash}
 
-\def\boxes_smash
+\def\syst_boxes_smash
   {\ifx\nexttoken[%
-     \expandafter\boxes_smash_yes
+     \expandafter\syst_boxes_smash_yes
    \else
-     \expandafter\boxes_smash_nop
+     \expandafter\syst_boxes_smash_nop
    \fi}
 
-\def\boxes_smash_nop
+\def\syst_boxes_smash_nop
   {\edef\m_boxes_smash_options{hd}%
-   \futurelet\nexttoken\boxes_smash_indeed}
+   \futurelet\nexttoken\syst_boxes_smash_indeed}
 
-\def\boxes_smash_yes[#1]%
+\def\syst_boxes_smash_yes[#1]%
   {\edef\m_boxes_smash_options{#1}%
-   \futurelet\nexttoken\boxes_smash_indeed}
+   \futurelet\nexttoken\syst_boxes_smash_indeed}
 
-\def\boxes_smash_indeed
+\def\syst_boxes_smash_indeed
   {\ifmmode
-     \expandafter\boxes_smash_math
+     \expandafter\syst_boxes_smash_math
    \else\ifx\nexttoken\bgroup
-     \doubleexpandafter\boxes_smash_hbox
+     \doubleexpandafter\syst_boxes_smash_hbox
    \else
-     \doubleexpandafter\boxes_smash_text
+     \doubleexpandafter\syst_boxes_smash_text
    \fi\fi}
 
-\def\boxes_smash_math#1%
-  {\boxes_math_set_nextbox{#1}%
-   \boxes_smash_process}
+\def\syst_boxes_smash_math#1%
+  {\syst_boxes_math_set_nextbox{#1}%
+   \syst_boxes_smash_process}
 
-\def\boxes_smash_hbox
-  {\dowithnextboxcs\boxes_smash_process\normalhbox}
+\def\syst_boxes_smash_hbox
+  {\dowithnextboxcs\syst_boxes_smash_process\normalhbox}
 
-\def\boxes_smash_text#1%
+\def\syst_boxes_smash_text#1%
   {\setbox\nextbox\normalhbox{#1}%
-   \boxes_smash_process}
+   \syst_boxes_smash_process}
 
-\def\boxes_smash_process
-  {\expandafter\boxes_smash_process_option\m_boxes_smash_options\relax
+\def\syst_boxes_smash_process
+  {\expandafter\syst_boxes_smash_process_option\m_boxes_smash_options\relax
    \box\nextbox
    \endgroup}
 
-\def\boxes_s_w{\wd\nextbox\zeropoint}
-\def\boxes_s_h{\ht\nextbox\zeropoint}
-\def\boxes_s_d{\dp\nextbox\zeropoint}
-\def\boxes_s_t{\ht\nextbox\zeropoint}
-\def\boxes_s_b{\dp\nextbox\zeropoint}
+\def\syst_boxes_s_w{\wd\nextbox\zeropoint}
+\def\syst_boxes_s_h{\ht\nextbox\zeropoint}
+\def\syst_boxes_s_d{\dp\nextbox\zeropoint}
+\def\syst_boxes_s_t{\ht\nextbox\zeropoint}
+\def\syst_boxes_s_b{\dp\nextbox\zeropoint}
 
-\def\boxes_smash_process_option#1%
+\def\syst_boxes_smash_process_option#1%
   {\ifx#1\relax\else
      \csname boxes_s_#1\endcsname
-     \expandafter\boxes_smash_process_option
+     \expandafter\syst_boxes_smash_process_option
    \fi}
 
 %D \starttabulate[|l|l|]
@@ -269,50 +269,50 @@
 %D thereby \type {\mathchoice}, the next macro looks ugly.
 %D We also take care of non||braced arguments.
 
-\unexpanded\def\phantom {\begingroup\futurelet\nexttoken\boxes_phantom_indeed  }
-\unexpanded\def\vphantom{\begingroup\futurelet\nexttoken\boxes_phantom_indeed_v}
-\unexpanded\def\hphantom{\begingroup\futurelet\nexttoken\boxes_phantom_indeed_h}
+\unexpanded\def\phantom {\begingroup\futurelet\nexttoken\syst_boxes_phantom_indeed  }
+\unexpanded\def\vphantom{\begingroup\futurelet\nexttoken\syst_boxes_phantom_indeed_v}
+\unexpanded\def\hphantom{\begingroup\futurelet\nexttoken\syst_boxes_phantom_indeed_h}
 
-\def\boxes_phantom_math  #1{\boxes_math_set_nextbox{#1}\boxes_phantom_make  }
-\def\boxes_phantom_math_v#1{\boxes_math_set_nextbox{#1}\boxes_phantom_make_v}
-\def\boxes_phantom_math_h#1{\boxes_math_set_nextbox{#1}\boxes_phantom_make_h}
+\def\syst_boxes_phantom_math  #1{\syst_boxes_math_set_nextbox{#1}\syst_boxes_phantom_make  }
+\def\syst_boxes_phantom_math_v#1{\syst_boxes_math_set_nextbox{#1}\syst_boxes_phantom_make_v}
+\def\syst_boxes_phantom_math_h#1{\syst_boxes_math_set_nextbox{#1}\syst_boxes_phantom_make_h}
 
-\def\boxes_phantom_hbox  {\dowithnextboxcs\boxes_phantom_make  \normalhbox} % always hbox
-\def\boxes_phantom_hbox_v{\dowithnextboxcs\boxes_phantom_make_v\normalhbox} % always hbox
-\def\boxes_phantom_hbox_h{\dowithnextboxcs\boxes_phantom_make_h\normalhbox} % always hbox
+\def\syst_boxes_phantom_hbox  {\dowithnextboxcs\syst_boxes_phantom_make  \normalhbox} % always hbox
+\def\syst_boxes_phantom_hbox_v{\dowithnextboxcs\syst_boxes_phantom_make_v\normalhbox} % always hbox
+\def\syst_boxes_phantom_hbox_h{\dowithnextboxcs\syst_boxes_phantom_make_h\normalhbox} % always hbox
 
-\def\boxes_phantom_text  #1{\setbox\nextbox\normalhbox{#1}\boxes_phantom_make  } % always hbox
-\def\boxes_phantom_text_v#1{\setbox\nextbox\normalhbox{#1}\boxes_phantom_make_v} % always hbox
-\def\boxes_phantom_text_h#1{\setbox\nextbox\normalhbox{#1}\boxes_phantom_make_h} % always hbox
+\def\syst_boxes_phantom_text  #1{\setbox\nextbox\normalhbox{#1}\syst_boxes_phantom_make  } % always hbox
+\def\syst_boxes_phantom_text_v#1{\setbox\nextbox\normalhbox{#1}\syst_boxes_phantom_make_v} % always hbox
+\def\syst_boxes_phantom_text_h#1{\setbox\nextbox\normalhbox{#1}\syst_boxes_phantom_make_h} % always hbox
 
-\def\boxes_phantom_indeed
+\def\syst_boxes_phantom_indeed
   {\ifmmode
-     \expandafter\boxes_phantom_math
+     \expandafter\syst_boxes_phantom_math
    \else\ifx\nexttoken\bgroup
-     \doubleexpandafter\boxes_phantom_hbox
+     \doubleexpandafter\syst_boxes_phantom_hbox
    \else
-     \doubleexpandafter\boxes_phantom_text
+     \doubleexpandafter\syst_boxes_phantom_text
    \fi\fi}
 
-\def\boxes_phantom_indeed_v
+\def\syst_boxes_phantom_indeed_v
   {\ifmmode
-     \expandafter\boxes_phantom_math_v
+     \expandafter\syst_boxes_phantom_math_v
    \else\ifx\nexttoken\bgroup
-     \doubleexpandafter\boxes_phantom_hbox_v
+     \doubleexpandafter\syst_boxes_phantom_hbox_v
    \else
-     \doubleexpandafter\boxes_phantom_text_v
+     \doubleexpandafter\syst_boxes_phantom_text_v
    \fi\fi}
 
-\def\boxes_phantom_indeed_h
+\def\syst_boxes_phantom_indeed_h
   {\ifmmode
-     \expandafter\boxes_phantom_math_h
+     \expandafter\syst_boxes_phantom_math_h
    \else\ifx\nexttoken\bgroup
-     \doubleexpandafter\boxes_phantom_hbox_h
+     \doubleexpandafter\syst_boxes_phantom_hbox_h
    \else
-     \doubleexpandafter\boxes_phantom_text_h
+     \doubleexpandafter\syst_boxes_phantom_text_h
    \fi\fi}
 
-\def\boxes_phantom_make
+\def\syst_boxes_phantom_make
   {\setbox\scratchbox\emptyhbox
    \ht\scratchbox\ht\nextbox
    \dp\scratchbox\dp\nextbox
@@ -320,14 +320,14 @@
    \box\scratchbox
    \endgroup}
 
-\def\boxes_phantom_make_v
+\def\syst_boxes_phantom_make_v
   {\setbox\scratchbox\emptyhbox
    \ht\scratchbox\ht\nextbox
    \dp\scratchbox\dp\nextbox
    \box\scratchbox
    \endgroup}
 
-\def\boxes_phantom_make_h
+\def\syst_boxes_phantom_make_h
   {\setbox\scratchbox\emptyhbox
    \wd\scratchbox\wd\nextbox
    \box\scratchbox
@@ -597,45 +597,45 @@
 %D the box.
 
 \unexpanded\def\dowithnextbox#1%
-  {\def\boxes_with_next_box{#1}%
-   \afterassignment\boxes_with_next_box_indeed
+  {\def\syst_boxes_with_next_box{#1}%
+   \afterassignment\syst_boxes_with_next_box_indeed
    \setbox\nextbox}
 
-\def\boxes_with_next_box_indeed
-  {\aftergroup\boxes_with_next_box}
+\def\syst_boxes_with_next_box_indeed
+  {\aftergroup\syst_boxes_with_next_box}
 
 \unexpanded\def\dowithnextboxcs#1%
-  {\let\boxes_with_next_box#1%
-   \afterassignment\boxes_with_next_box_indeed
+  {\let\syst_boxes_with_next_box#1%
+   \afterassignment\syst_boxes_with_next_box_indeed
    \setbox\nextbox}
 
 %D So in fact we get:
 %D
 %D \starttyping
-%D \setbox\nextbox { \aftergroup\boxes_with_next_box ... }
+%D \setbox\nextbox { \aftergroup\syst_boxes_with_next_box ... }
 %D \stoptyping
 %D
 %D or
 %D
 %D \starttyping
-%D \setbox\nextbox { ... } \boxes_with_next_box
+%D \setbox\nextbox { ... } \syst_boxes_with_next_box
 %D \stoptyping
 %D
 %D A slower but more versatile implementation is:
 %D
 %D \starttyping
 %D \long\def\dowithnextbox#1#2%
-%D   {\long\def\boxes_with_next_box{#1}%
+%D   {\long\def\syst_boxes_with_next_box{#1}%
 %D    \ifx#2\normalhbox
-%D      \afterassignment\boxes_with_next_box_indeed
+%D      \afterassignment\syst_boxes_with_next_box_indeed
 %D    \else\ifx#2\normalvbox
-%D      \afterassignment\boxes_with_next_box_indeed
+%D      \afterassignment\syst_boxes_with_next_box_indeed
 %D    \else\ifx#2\normalvtop
-%D      \afterassignment\boxes_with_next_box_indeed
+%D      \afterassignment\syst_boxes_with_next_box_indeed
 %D    \else\ifx#2\normalvcenter
-%D      \afterassignment\boxes_with_next_box_indeed
+%D      \afterassignment\syst_boxes_with_next_box_indeed
 %D    \else
-%D      \afterassignment\boxes_with_next_box
+%D      \afterassignment\syst_boxes_with_next_box
 %D    \fi\fi\fi\fi
 %D    \setbox\nextbox#2}
 %D \stoptyping
@@ -670,19 +670,19 @@
 %D {\em todo: Search source for potential usage!}
 
 \unexpanded\def\dowithnextboxcontent#1#2% inside, after
-  {\def\boxes_with_next_box_one{#2}%
-   \def\boxes_with_next_box_two{#1}%
-   \afterassignment\boxes_with_next_box_content_indeed
+  {\def\syst_boxes_with_next_box_one{#2}%
+   \def\syst_boxes_with_next_box_two{#1}%
+   \afterassignment\syst_boxes_with_next_box_content_indeed
    \setbox\nextbox}
 
 \unexpanded\def\dowithnextboxcontentcs#1#2% inside, after
-  {\let\boxes_with_next_box_one#2%
-   \let\boxes_with_next_box_two#1%
-   \afterassignment\boxes_with_next_box_content_indeed
+  {\let\syst_boxes_with_next_box_one#2%
+   \let\syst_boxes_with_next_box_two#1%
+   \afterassignment\syst_boxes_with_next_box_content_indeed
    \setbox\nextbox}
 
-\def\boxes_with_next_box_content_indeed
-  {\boxes_with_next_box_two\aftergroup\boxes_with_next_box_one}
+\def\syst_boxes_with_next_box_content_indeed
+  {\syst_boxes_with_next_box_two\aftergroup\syst_boxes_with_next_box_one}
 
 %D \macros
 %D   {llap, rlap, tlap, blap, clap}
@@ -886,15 +886,15 @@
   {\global\setbox\tmpshapebox\vbox{\vskip-\lineheight\unvcopy\oldshapebox}}
 
 \def\dodoreshapebox#1#2#3#4% \shapebox, \shapepenalty, \shapekern, \shapeskip
-  {\ifnum\lastnodetype=\@@gluenode
+  {\ifnum\lastnodetype=\gluenodecode
      \shapeskip\lastskip
      \global\setbox\tmpshapebox\normalvbox{#4\unvbox\tmpshapebox}%
      \unskip
-   \else\ifnum\lastnodetype=\@@kernnode
+   \else\ifnum\lastnodetype=\kernnodecode
      \shapekern\lastkern
      \global\setbox\tmpshapebox\normalvbox{#3\unvbox\tmpshapebox}%
      \unkern
-   \else\ifnum\lastnodetype=\@@penaltynode
+   \else\ifnum\lastnodetype=\penaltynodecode
      \shapepenalty\lastpenalty
      \global\setbox\tmpshapebox\normalvbox{#2\unvbox\tmpshapebox}%
      \unpenalty
@@ -1175,16 +1175,16 @@
    \forgetall % otherwise indentation and so
    \let\limitatetext\firstofthreearguments
    \fakecompoundhyphen % dangerous ! ! ! ! ! ! ! ! !
-   \dowithnextboxcs\boxes_limitate_text\normalhbox}
+   \dowithnextboxcs\syst_boxes_limitate_text\normalhbox}
 
-\def\boxes_limitate_text#1% #2
-  {\doifelsenothing{#1}\boxes_limitate_text_nop\boxes_limitate_text_yes{#1}} % {#2}
+\def\syst_boxes_limitate_text#1% #2
+  {\doifelsenothing{#1}\syst_boxes_limitate_text_nop\syst_boxes_limitate_text_yes{#1}} % {#2}
 
-\def\boxes_limitate_text_nop#1#2%
+\def\syst_boxes_limitate_text_nop#1#2%
   {\unhbox\nextbox
    \egroup}
 
-\def\boxes_limitate_text_yes#1#2%
+\def\syst_boxes_limitate_text_yes#1#2%
   {\nopenalties
    \scratchdimen#1\relax
    \ifdim\scratchdimen<\zeropoint\relax % we'll take the last line
@@ -1386,9 +1386,9 @@
 
 \unexpanded\def\sbox
   {\normalvbox\bgroup
-   \dowithnextboxcs\boxes_sbox_finish\normalvbox}
+   \dowithnextboxcs\syst_boxes_sbox_finish\normalvbox}
 
-\unexpanded\def\boxes_sbox_finish
+\unexpanded\def\syst_boxes_sbox_finish
   {\setbox\nextbox\normalhbox
      {\strut
       \dp\nextbox\zeropoint
@@ -1406,9 +1406,9 @@
 
 \unexpanded\def\struttedbox
   {\normalhbox\bgroup
-   \dowithnextboxcs\boxes_struttedbox_finish\normalhbox}
+   \dowithnextboxcs\syst_boxes_struttedbox_finish\normalhbox}
 
-\def\boxes_struttedbox_finish
+\def\syst_boxes_struttedbox_finish
   {\ht\nextbox\strutdepth
    \ht\nextbox\strutheight
    \box\nextbox
@@ -1422,9 +1422,9 @@
 %D equals strutdepth.
 
 \unexpanded\def\topskippedbox
-  {\normalhbox\bgroup\dowithnextboxcs\boxes_topskippedbox_finish\normalhbox}
+  {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_topskippedbox_finish\normalhbox}
 
-\def\boxes_topskippedbox_finish
+\def\syst_boxes_topskippedbox_finish
   {\edef\m_boxes_tmp{\ifdim\strutdepth=\dp\nextbox\dp\nextbox\the\dp\nextbox\fi}%
    \lower\topskip\normalhbox{\raise\strutheight\box\nextbox}%
    \m_boxes_tmp
@@ -1862,28 +1862,28 @@
 %
 % \unexpanded\def\processboxes#1%
 %   {\bgroup
-%    \def\boxes_process_indeed{#1}% #1 can be redefined halfway
+%    \def\syst_boxes_process_indeed{#1}% #1 can be redefined halfway
 %    \setbox\processbox\emptybox
-%    \afterassignment\boxes_process
+%    \afterassignment\syst_boxes_process
 %    \let\nexttoken}
 %
-% \def\boxes_process
+% \def\syst_boxes_process
 %   {\ifx\nexttoken\bgroup
-%      \expandafter\boxes_process_yes
+%      \expandafter\syst_boxes_process_yes
 %    \else
-%      \expandafter\boxes_process_nop
+%      \expandafter\syst_boxes_process_nop
 %    \fi}
 %
-% \def\boxes_process_yes
-%   {\dowithnextboxcs\boxes_process_content\normalhbox\bgroup}
+% \def\syst_boxes_process_yes
+%   {\dowithnextboxcs\syst_boxes_process_content\normalhbox\bgroup}
 %
-% \def\boxes_process_content
+% \def\syst_boxes_process_content
 %   {\removeunwantedspaces
-%    \boxes_process_indeed % takes \nextbox makes \processbox
-%    \afterassignment\boxes_process
+%    \syst_boxes_process_indeed % takes \nextbox makes \processbox
+%    \afterassignment\syst_boxes_process
 %    \let\nexttoken}
 %
-% \unexpanded\def\boxes_process_nop
+% \unexpanded\def\syst_boxes_process_nop
 %   {\removeunwantedspaces
 %    \box\processbox
 %    \nexttoken % messy as we are still in the group
@@ -1893,19 +1893,19 @@
 
 \unexpanded\def\processboxes#1%
   {\bgroup
-   \def\boxes_process_indeed{#1}% #1 can be redefined halfway
+   \def\syst_boxes_process_indeed{#1}% #1 can be redefined halfway
    \setbox\processbox\emptybox
-   \doifnextbgroupelse\boxes_process_yes\boxes_process_nop}
+   \doifnextbgroupelse\syst_boxes_process_yes\syst_boxes_process_nop}
 
-\def\boxes_process_yes
-  {\dowithnextboxcs\boxes_process_content\normalhbox}
+\def\syst_boxes_process_yes
+  {\dowithnextboxcs\syst_boxes_process_content\normalhbox}
 
-\def\boxes_process_content
+\def\syst_boxes_process_content
   {\removeunwantedspaces
-   \boxes_process_indeed % takes \nextbox makes \processbox
-   \doifnextbgroupelse\boxes_process_yes\boxes_process_nop}
+   \syst_boxes_process_indeed % takes \nextbox makes \processbox
+   \doifnextbgroupelse\syst_boxes_process_yes\syst_boxes_process_nop}
 
-\unexpanded\def\boxes_process_nop
+\unexpanded\def\syst_boxes_process_nop
   {\removeunwantedspaces
    \box\processbox
    \egroup}
@@ -1929,7 +1929,7 @@
 %D
 %D \leavevmode\getbuffer
 
-\def\boxes_overlay_process
+\def\syst_boxes_overlay_process
   {%\removeunwantedspaces % already done
    \scratchdepth\dp\ifdim\dp\nextbox>\dp\processbox\nextbox\else\processbox\fi
    \ifdim\ht\nextbox>\ht\processbox
@@ -1948,7 +1948,7 @@
 \unexpanded\def\startoverlay
   {\bgroup
    \let\stopoverlay\egroup
-   \processboxes\boxes_overlay_process}
+   \processboxes\syst_boxes_overlay_process}
 
 \let\stopoverlay\relax
 
@@ -1966,9 +1966,9 @@
 
 \unexpanded\def\fakebox
   {\bgroup
-   \afterassignment\boxes_fakebox_finish\scratchcounter}
+   \afterassignment\syst_boxes_fakebox_finish\scratchcounter}
 
-\def\boxes_fakebox_finish
+\def\syst_boxes_fakebox_finish
   {\setbox\scratchbox\ifhbox\scratchcounter\emptyhbox\else\emptyvbox\fi
    \wd\scratchbox\wd\scratchcounter
    \ht\scratchbox\ht\scratchcounter
@@ -1992,15 +1992,15 @@
 %D middle and right. These box types can be used to typeset
 %D paragraphs.
 
-\def\boxes_lrc_process#1{\bgroup\forgetall\let\\\endgraf#1\let\next}
+\def\syst_boxes_lrc_process#1{\bgroup\forgetall\let\\\endgraf#1\let\next}
 
-\unexpanded\def\lbox#1#{\normalvbox#1\boxes_lrc_process\raggedleft  }
-\unexpanded\def\cbox#1#{\normalvbox#1\boxes_lrc_process\raggedcenter}
-\unexpanded\def\rbox#1#{\normalvbox#1\boxes_lrc_process\raggedright }
+\unexpanded\def\lbox#1#{\normalvbox#1\syst_boxes_lrc_process\raggedleft  }
+\unexpanded\def\cbox#1#{\normalvbox#1\syst_boxes_lrc_process\raggedcenter}
+\unexpanded\def\rbox#1#{\normalvbox#1\syst_boxes_lrc_process\raggedright }
 
-\unexpanded\def\ltop#1#{\normalvtop#1\boxes_lrc_process\raggedleft  }
-\unexpanded\def\ctop#1#{\normalvtop#1\boxes_lrc_process\raggedcenter}
-\unexpanded\def\rtop#1#{\normalvtop#1\boxes_lrc_process\raggedright }
+\unexpanded\def\ltop#1#{\normalvtop#1\syst_boxes_lrc_process\raggedleft  }
+\unexpanded\def\ctop#1#{\normalvtop#1\syst_boxes_lrc_process\raggedcenter}
+\unexpanded\def\rtop#1#{\normalvtop#1\syst_boxes_lrc_process\raggedright }
 
 %D The alternatives \type {\tbox} and \type {\bbox} can be used
 %D to properly align boxes, like in:
@@ -2022,10 +2022,10 @@
 %D
 %D \getbuffer
 
-\unexpanded\def\tbox{\normalhbox\bgroup\dowithnextboxcs\boxes_tbox_finish\normalhbox}
-\unexpanded\def\bbox{\normalhbox\bgroup\dowithnextboxcs\boxes_bbox_finish\normalhbox}
+\unexpanded\def\tbox{\normalhbox\bgroup\dowithnextboxcs\syst_boxes_tbox_finish\normalhbox}
+\unexpanded\def\bbox{\normalhbox\bgroup\dowithnextboxcs\syst_boxes_bbox_finish\normalhbox}
 
-\def\boxes_tbox_finish
+\def\syst_boxes_tbox_finish
   {\scratchdepth\dimexpr\ht\nextbox+\dp\nextbox-\ht\strutbox\relax
    \ht\nextbox\ht\strutbox
    \dp\nextbox\scratchdepth
@@ -2035,7 +2035,7 @@
    \box\nextbox
    \egroup}
 
-\def\boxes_bbox_finish
+\def\syst_boxes_bbox_finish
   {\scratchheight\dimexpr\ht\nextbox+\dp\nextbox-\dp\strutbox\relax
    \dp\nextbox\dp\strutbox
    \ht\nextbox\scratchheight
@@ -2164,28 +2164,28 @@
 \newdimen\boxhdisplacement
 \newdimen\boxvdisplacement
 
-\unexpanded\def\rightbox      {\normalhbox\bgroup\dowithnextboxcs\boxes_rightbox_finish      \placedbox}
-\unexpanded\def\leftbox       {\normalhbox\bgroup\dowithnextboxcs\boxes_leftbox_finish       \placedbox}
-\unexpanded\def\topbox        {\normalhbox\bgroup\dowithnextboxcs\boxes_topbox_finish        \placedbox}
-\unexpanded\def\bottombox     {\normalhbox\bgroup\dowithnextboxcs\boxes_bottombox_finish     \placedbox}
-\unexpanded\def\lefttopbox    {\normalhbox\bgroup\dowithnextboxcs\boxes_lefttopbox_finish    \placedbox}
-\unexpanded\def\righttopbox   {\normalhbox\bgroup\dowithnextboxcs\boxes_righttopbox_finish   \placedbox}
-\unexpanded\def\leftbottombox {\normalhbox\bgroup\dowithnextboxcs\boxes_leftbottombox_finish \placedbox}
-\unexpanded\def\rightbottombox{\normalhbox\bgroup\dowithnextboxcs\boxes_rightbottombox_finish\placedbox}
+\unexpanded\def\rightbox      {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_rightbox_finish      \placedbox}
+\unexpanded\def\leftbox       {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_leftbox_finish       \placedbox}
+\unexpanded\def\topbox        {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_topbox_finish        \placedbox}
+\unexpanded\def\bottombox     {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_bottombox_finish     \placedbox}
+\unexpanded\def\lefttopbox    {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_lefttopbox_finish    \placedbox}
+\unexpanded\def\righttopbox   {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_righttopbox_finish   \placedbox}
+\unexpanded\def\leftbottombox {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_leftbottombox_finish \placedbox}
+\unexpanded\def\rightbottombox{\normalhbox\bgroup\dowithnextboxcs\syst_boxes_rightbottombox_finish\placedbox}
 
 \let\topleftbox    \lefttopbox
 \let\toprightbox   \righttopbox
 \let\bottomleftbox \leftbottombox
 \let\bottomrightbox\rightbottombox
 
-\def\boxes_rightbox_finish
+\def\syst_boxes_rightbox_finish
   {\global\boxhdisplacement\boxoffset
    \global\boxvdisplacement.5\ht\nextbox
    \global\advance\boxvdisplacement-.5\dp\nextbox
    \boxcursor\hskip\boxhdisplacement\lower\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_rightbox_finish
+\def\syst_boxes_rightbox_finish
   {\global\boxhdisplacement-\wd\nextbox
    \global\advance\boxhdisplacement-\boxoffset
    \global\boxvdisplacement.5\ht\nextbox
@@ -2193,21 +2193,21 @@
    \boxcursor\hskip\boxhdisplacement\lower\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_topbox_finish
+\def\syst_boxes_topbox_finish
   {\global\boxhdisplacement-.5\wd\nextbox
    \global\boxvdisplacement-\dp\nextbox
    \global\advance\boxvdisplacement-\boxoffset
    \boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_bottombox_finish
+\def\syst_boxes_bottombox_finish
   {\global\boxhdisplacement-.5\wd\nextbox
    \global\boxvdisplacement\ht\nextbox
    \global\advance\boxvdisplacement\boxoffset
    \boxcursor\hskip\boxhdisplacement\lower\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_lefttopbox_finish
+\def\syst_boxes_lefttopbox_finish
   {\global\boxhdisplacement-\wd\nextbox
    \global\advance\boxhdisplacement-\boxoffset
    \global\boxvdisplacement-\dp\nextbox
@@ -2215,14 +2215,14 @@
    \boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_righttopbox_finish
+\def\syst_boxes_righttopbox_finish
   {\global\boxhdisplacement\boxoffset
    \global\boxvdisplacement-\dp\nextbox
    \global\advance\boxvdisplacement-\boxoffset
    \boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_leftbottombox_finish
+\def\syst_boxes_leftbottombox_finish
   {\global\boxhdisplacement-\wd\nextbox
    \global\advance\boxhdisplacement-\boxoffset
    \global\boxvdisplacement\ht\nextbox
@@ -2230,40 +2230,40 @@
    \boxcursor\hskip\boxhdisplacement\lower\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_rightbottombox_finish
+\def\syst_boxes_rightbottombox_finish
   {\global\boxhdisplacement\boxoffset
    \global\boxvdisplacement\ht\nextbox
    \global\advance\boxvdisplacement\boxoffset
    \boxcursor\hskip\boxhdisplacement\lower\boxvdisplacement\box\nextbox
    \egroup}
 
-\unexpanded\def\middlebox        {\normalhbox\bgroup\dowithnextboxcs\boxes_middlebox_finish        \placedbox}
-\unexpanded\def\baselinemiddlebox{\normalhbox\bgroup\dowithnextboxcs\boxes_baselinemiddlebox_finish\placedbox}
-\unexpanded\def\baselineleftbox  {\normalhbox\bgroup\dowithnextboxcs\boxes_baselineleftbox_finish  \placedbox}
-\unexpanded\def\baselinerightbox {\normalhbox\bgroup\dowithnextboxcs\boxes_baselinerightbox_finish \placedbox}
+\unexpanded\def\middlebox        {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_middlebox_finish        \placedbox}
+\unexpanded\def\baselinemiddlebox{\normalhbox\bgroup\dowithnextboxcs\syst_boxes_baselinemiddlebox_finish\placedbox}
+\unexpanded\def\baselineleftbox  {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_baselineleftbox_finish  \placedbox}
+\unexpanded\def\baselinerightbox {\normalhbox\bgroup\dowithnextboxcs\syst_boxes_baselinerightbox_finish \placedbox}
 
-\def\boxes_middlebox_finish
+\def\syst_boxes_middlebox_finish
   {\global\boxhdisplacement-.5\wd\nextbox
    \global\boxvdisplacement.5\ht\nextbox
    \global\advance\boxvdisplacement-.5\dp\nextbox
    \boxcursor\hskip\boxhdisplacement\lower\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_baselinemiddlebox_finish
+\def\syst_boxes_baselinemiddlebox_finish
   {\global\boxhdisplacement-.5\wd\nextbox
    \global\advance\boxhdisplacement-\boxoffset
    \global\boxvdisplacement-\boxoffset
    \boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_baselineleftbox_finish
+\def\syst_boxes_baselineleftbox_finish
   {\global\boxhdisplacement-\wd\nextbox
    \global\advance\boxhdisplacement-\boxoffset
    \global\boxvdisplacement-\boxoffset
    \boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box\nextbox
    \egroup}
 
-\def\boxes_baselinerightbox_finish
+\def\syst_boxes_baselinerightbox_finish
   {\global\boxhdisplacement\boxoffset
    \global\boxvdisplacement-\boxoffset
    \boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box\nextbox
@@ -2288,9 +2288,9 @@
 %D See core-tbl.tex for an example of its usage:
 
 \unexpanded\def\toplinebox
-  {\dowithnextboxcs\boxes_toplinebox_finish\tbox}
+  {\dowithnextboxcs\syst_boxes_toplinebox_finish\tbox}
 
-\def\boxes_toplinebox_finish
+\def\syst_boxes_toplinebox_finish
   {\ifdim\dp\nextbox>\strutdepth
      \scratchdimen\dp\nextbox
      \advance\scratchdimen-\strutdepth
@@ -2423,20 +2423,20 @@
 %D \hsmash{\raisebox{100pt}\normalhbox{test}}
 %D \stoptyping
 
-\unexpanded\def\raisebox#1{\bgroup\afterassignment\boxes_raise_indeed\scratchdimen#1} % so both 10pt and {10pt} is accepted
-\unexpanded\def\lowerbox#1{\bgroup\afterassignment\boxes_lower_indeed\scratchdimen#1} % so both 10pt and {10pt} is accepted
+\unexpanded\def\raisebox#1{\bgroup\afterassignment\syst_boxes_raise_indeed\scratchdimen#1} % so both 10pt and {10pt} is accepted
+\unexpanded\def\lowerbox#1{\bgroup\afterassignment\syst_boxes_lower_indeed\scratchdimen#1} % so both 10pt and {10pt} is accepted
 
-\def\boxes_raise_indeed{\dowithnextboxcs\boxes_raise_finish}
-\def\boxes_lower_indeed{\dowithnextboxcs\boxes_lower_finish}
+\def\syst_boxes_raise_indeed{\dowithnextboxcs\syst_boxes_raise_finish}
+\def\syst_boxes_lower_indeed{\dowithnextboxcs\syst_boxes_lower_finish}
 
-\def\boxes_raise_finish#1%
+\def\syst_boxes_raise_finish#1%
   {\setbox\nextbox\normalhbox{\raise\scratchdimen\box\nextbox}%
    \ht\nextbox\strutht
    \dp\nextbox\strutdp
    \box\nextbox
    \egroup}
 
-\def\boxes_lower_finish#1%
+\def\syst_boxes_lower_finish#1%
   {\setbox\nextbox\normalhbox{\lower\scratchdimen\box\nextbox}%
    \ht\nextbox\strutht
    \dp\nextbox\strutdp
@@ -2447,9 +2447,9 @@
 
 \unexpanded\def\halfwaybox
   {\normalhbox\bgroup
-   \dowithnextboxcs\boxes_halfwaybox_finish\normalhbox}
+   \dowithnextboxcs\syst_boxes_halfwaybox_finish\normalhbox}
 
-\def\boxes_halfwaybox_finish
+\def\syst_boxes_halfwaybox_finish
   {\dp\nextbox\zeropoint
    \lower.5\ht\nextbox\box\nextbox
    \egroup}
@@ -2483,9 +2483,9 @@
 
 \unexpanded\def\vcenter
   {\normalvbox\bgroup
-   \dowithnextboxcs\boxes_vcenter_finish\normalvbox}
+   \dowithnextboxcs\syst_boxes_vcenter_finish\normalvbox}
 
-\def\boxes_vcenter_finish
+\def\syst_boxes_vcenter_finish
   {\normalhbox{$\verynormalvcenter{\box\nextbox}$}%
    \egroup}
 
@@ -2501,9 +2501,9 @@
 
 \unexpanded\def\frozenhbox
   {\normalhbox\bgroup
-   \dowithnextboxcs\boxes_frozenhbox_finish\normalhbox}
+   \dowithnextboxcs\syst_boxes_frozenhbox_finish\normalhbox}
 
-\def\boxes_frozenhbox_finish
+\def\syst_boxes_frozenhbox_finish
   {\normalhbox{\normalhbox{\box\nextbox}}%
    \egroup}