diff --git a/runtime/syntax/sinda.vim b/runtime/syntax/sinda.vim
new file mode 100644
index 0000000..2bde267
--- /dev/null
+++ b/runtime/syntax/sinda.vim
@@ -0,0 +1,146 @@
+" Vim syntax file
+" Language:     sinda85, sinda/fluint input file
+" Maintainer:   Adrian Nagle, anagle@ball.com
+" Last Change:  2003 May 11
+" Filenames:    *.sin
+" URL:		http://www.naglenet.org/vim/syntax/sinda.vim
+" MAIN URL:     http://www.naglenet.org/vim/
+
+
+
+" For version 5.x: Clear all syntax items
+" For version 6.x: Quit when a syntax file was already loaded
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+
+
+" Ignore case
+syn case ignore
+
+
+
+"
+"
+" Begin syntax definitions for sinda input and output files.
+"
+
+" Force free-form fortran format
+let fortran_free_source=1
+
+" Load FORTRAN syntax file
+if version < 600
+  source <sfile>:p:h/fortran.vim
+else
+  runtime! syntax/fortran.vim
+endif
+unlet b:current_syntax
+
+
+
+" Define keywords for SINDA
+syn keyword sindaMacro    BUILD BUILDF DEBON DEBOFF DEFMOD FSTART FSTOP
+
+syn keyword sindaOptions  TITLE PPSAVE RSI RSO OUTPUT SAVE QMAP USER1 USER2
+syn keyword sindaOptions  MODEL PPOUT NOLIST MLINE NODEBUG DIRECTORIES
+syn keyword sindaOptions  DOUBLEPR
+
+syn keyword sindaRoutine  FORWRD FWDBCK STDSTL FASTIC
+
+syn keyword sindaControl  ABSZRO ACCELX ACCELY ACCELZ ARLXCA ATMPCA
+syn keyword sindaControl  BACKUP CSGFAC DRLXCA DTIMEH DTIMEI DTIMEL
+syn keyword sindaControl  DTIMES DTMPCA EBALNA EBALSA EXTLIM ITEROT
+syn keyword sindaControl  ITERXT ITHOLD NLOOPS NLOOPT OUTPUT OPEITR
+syn keyword sindaControl  PATMOS SIGMA TIMEO TIMEND UID
+
+syn keyword sindaSubRoutine  ASKERS ADARIN ADDARY ADDMOD ARINDV
+syn keyword sindaSubRoutine  RYINV ARYMPY ARYSUB ARYTRN BAROC
+syn keyword sindaSubRoutine  BELACC BNDDRV BNDGET CHENNB CHGFLD
+syn keyword sindaSubRoutine  CHGLMP CHGSUC CHGVOL CHKCHL CHKCHP
+syn keyword sindaSubRoutine  CNSTAB COMBAL COMPLQ COMPRS CONTRN
+syn keyword sindaSubRoutine  CPRINT CRASH CRVINT CRYTRN CSIFLX
+syn keyword sindaSubRoutine  CVTEMP D11CYL C11DAI D11DIM D11MCY
+syn keyword sindaSubRoutine  D11MDA D11MDI D11MDT D12CYL D12MCY
+syn keyword sindaSubRoutine  D12MDA D1D1DA D1D1IM D1D1WM D1D2DA
+syn keyword sindaSubRoutine  D1D2WM D1DEG1 D1DEG2 D1DG1I D1IMD1
+syn keyword sindaSubRoutine  D1IMIM D1IMWM D1M1DA D1M2MD D1M2WM
+syn keyword sindaSubRoutine  D1MDG1 D1MDG2 D2D1WM D1DEG1 D2DEG2
+syn keyword sindaSubRoutine  D2D2
+
+syn keyword sindaIdentifier  BIV CAL DIM DIV DPM DPV DTV GEN PER PIV PIM
+syn keyword sindaIdentifier  SIM SIV SPM SPV TVS TVD
+
+
+
+" Define matches for SINDA
+syn match  sindaFortran     "^F[0-9 ]"me=e-1
+syn match  sindaMotran      "^M[0-9 ]"me=e-1
+
+syn match  sindaComment     "^C.*$"
+syn match  sindaComment     "^R.*$"
+syn match  sindaComment     "\$.*$"
+
+syn match  sindaHeader      "^header[^,]*"
+
+syn match  sindaIncludeFile "include \+[^ ]\+"hs=s+8 contains=fortranInclude
+
+syn match  sindaMacro       "^PSTART"
+syn match  sindaMacro       "^PSTOP"
+syn match  sindaMacro       "^FAC"
+
+syn match  sindaInteger     "-\=\<[0-9]*\>"
+syn match  sindaFloat       "-\=\<[0-9]*\.[0-9]*"
+syn match  sindaScientific  "-\=\<[0-9]*\.[0-9]*E[-+]\=[0-9]\+\>"
+
+syn match  sindaEndData		 "^END OF DATA"
+
+if exists("thermal_todo")
+  execute 'syn match  sindaTodo ' . '"^'.thermal_todo.'.*$"'
+else
+  syn match  sindaTodo     "^?.*$"
+endif
+
+
+
+" Define the default highlighting
+" For version 5.7 and earlier: only when not done already
+" For version 5.8 and later: only when an item doesn't have highlighting yet
+if version >= 508 || !exists("did_sinda_syntax_inits")
+  if version < 508
+    let did_sinda_syntax_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+
+  HiLink sindaMacro		Macro
+  HiLink sindaOptions		Special
+  HiLink sindaRoutine		Type
+  HiLink sindaControl		Special
+  HiLink sindaSubRoutine	Function
+  HiLink sindaIdentifier	Identifier
+
+  HiLink sindaFortran		PreProc
+  HiLink sindaMotran		PreProc
+
+  HiLink sindaComment		Comment
+  HiLink sindaHeader		Typedef
+  HiLink sindaIncludeFile	Type
+  HiLink sindaInteger		Number
+  HiLink sindaFloat		Float
+  HiLink sindaScientific	Float
+
+  HiLink sindaEndData		Macro
+
+  HiLink sindaTodo		Todo
+
+  delcommand HiLink
+endif
+
+
+let b:current_syntax = "sinda"
+
+" vim: ts=8 sw=2