typos in comments

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@1582 9d0c8265-081b-0410-96cb-a4ca84ce46f8

41 files changed, 50 insertions, 50 deletions

diff --git a/converter/other/fiasco/codec/approx.c b/converter/other/fiasco/codec/approx.c
index 72e38cbf..5072fae3 100644
--- a/converter/other/fiasco/codec/approx.c
+++ b/converter/other/fiasco/codec/approx.c
@@ -294,7 +294,7 @@ static real_t ip_domain_ortho_vector [MAXSTATES][MAXEDGES];
 static real_t rem_denominator [MAXSTATES];     
 static real_t rem_numerator [MAXSTATES];
 /*
- *  At step n of the orthogonalization the comparitive value
+ *  At step n of the orthogonalization the comparative value
  *  (numerator_i / denominator_i):= <b, o_n>^2 / ||o_n|| ,
  *  is computed for every domain i,
  *  where o_n := s_i - \sum(k = 0, ... , n-1) {(<s_i, o_k> / ||o_k||^2) o_k}
@@ -670,7 +670,7 @@ orthogonalize (unsigned index, unsigned n, unsigned level, real_t min_norm,
     *  for (i = 0, ... , wfa->states)  
     *  <s_i, o_n> := <s_i, v_n> -
     *      \sum (k = 0, ... , n - 1){ <v_n, o_k> <s_i, o_k> / ||o_k||^2}
-    *  Moreover the denominator and numerator parts of the comparitive
+    *  Moreover the denominator and numerator parts of the comparative
     *  value are updated.
     */
    for (domain = 0; domain_blocks [domain] >= 0; domain++) 
diff --git a/converter/other/fiasco/codec/subdivide.c b/converter/other/fiasco/codec/subdivide.c
index f845d859..059aa477 100644
--- a/converter/other/fiasco/codec/subdivide.c
+++ b/converter/other/fiasco/codec/subdivide.c
@@ -289,7 +289,7 @@ subdivide (real_t max_costs, unsigned band, int y_state, range_t *range,
 			  : rrange.y;
 	 
 	 /* 
-	  *  If neccessary compute the inner products of the new states
+	  *  If necessary compute the inner products of the new states
 	  *  (generated during the recursive approximation of child [0])
 	  */
 	 if (label && rrange.level <= c->options.lc_max_level)
diff --git a/converter/other/fiasco/codec/wfa.h b/converter/other/fiasco/codec/wfa.h
index 8b9793f2..0b96ba8c 100644
--- a/converter/other/fiasco/codec/wfa.h
+++ b/converter/other/fiasco/codec/wfa.h
@@ -122,7 +122,7 @@ typedef struct wfa
    real_t	*final_distribution;    /* one pixel images */
    byte_t	*level_of_state;	/* level of the image part which is
 					   represented by the current state */
-   byte_t	*domain_type;		/* Bit_0==1: auxilliary state
+   byte_t	*domain_type;		/* Bit_0==1: auxiliary state
 					   Bit_1==1: used for Y compr */
    mv_t		(*mv_tree)[MAXLABELS];	/* motion vectors */
    word_t	(*tree)[MAXLABELS];	/* bintree partitioning */
diff --git a/converter/other/fiasco/input/read.c b/converter/other/fiasco/input/read.c
index 23f92070..9690a6c5 100644
--- a/converter/other/fiasco/input/read.c
+++ b/converter/other/fiasco/input/read.c
@@ -277,7 +277,7 @@ read_basis (const char *filename, wfa_t *wfa)
     *   string		|MAGIC Number "Wfa"
     *	int		|Number of basis states 'N'
     *	bool_t-array[N]	|use vector in linear combinations,
-    *			|0: don't use vector (auxilliary state)
+    *			|0: don't use vector (auxiliary state)
     *			|1: use vector in linear combinations
     *	float-array[N]	|final distribution of every state
     *
diff --git a/converter/other/fiasco/lib/arith.c b/converter/other/fiasco/lib/arith.c
index e3745bf7..dc35d1d1 100644
--- a/converter/other/fiasco/lib/arith.c
+++ b/converter/other/fiasco/lib/arith.c
@@ -90,7 +90,7 @@ encode_symbol (unsigned symbol, arith_t *arith, model_t *model)
  *  The current state of the arithmetic coder is given by 'arith'.
  *  Output bits are appended to the stream 'output'.
  *
- *  The model is updated after encoding the symbol (if neccessary the
+ *  The model is updated after encoding the symbol (if necessary the
  *  symbol counts are rescaled).
  *  
  *  Return value:
@@ -354,7 +354,7 @@ decode_symbol (arith_t *arith, model_t *model)
  *  Decode the next symbol - the state of the arithmetic decoder
  *  is given in 'arith'. Read refinement bits from the stream 'input'
  *  and use the given probability 'model'. Update the probability model after
- *  deconding the symbol (if neccessary also rescale the symbol counts).
+ *  deconding the symbol (if necessary also rescale the symbol counts).
  *  
  *  Return value:
  *	decoded symbol
diff --git a/converter/other/fiasco/lib/misc.c b/converter/other/fiasco/lib/misc.c
index e0e41447..dd9f0bb2 100644
--- a/converter/other/fiasco/lib/misc.c
+++ b/converter/other/fiasco/lib/misc.c
@@ -1,5 +1,5 @@
 /*
- *  misc.c:		Some usefull functions, that don't fit in one of 
+ *  misc.c:		Some useful functions, that don't fit in one of 
  *			the other files and that are needed by at least
  *			two modules. 
  *
diff --git a/converter/other/infotopam.c b/converter/other/infotopam.c
index 0504a147..f2e35827 100644
--- a/converter/other/infotopam.c
+++ b/converter/other/infotopam.c
@@ -114,7 +114,7 @@ typedef struct DiskObject_ { /* 78 bytes (including Gadget struct) */
     unsigned char version[2];       /* Object version number */
     unsigned char gadget[44];       /* Copy of in memory gadget (44 by */
     unsigned char type;             /* ??? */
-    unsigned char pad;              /* Pad it out to the next word boundry */
+    unsigned char pad;              /* Pad it out to the next word boundary */
     unsigned char pDefaultTool[4];  /* Pointer  to default tool */
     unsigned char ppToolTypes[4];   /* Pointer pointer to tool types */
     unsigned char currentX[4];      /* Current X position (?) */
diff --git a/converter/other/jbig/jbig.c b/converter/other/jbig/jbig.c
index ebd7c08f..90295d8b 100644
--- a/converter/other/jbig/jbig.c
+++ b/converter/other/jbig/jbig.c
@@ -2330,7 +2330,7 @@ static size_t decode_pscd(struct jbg_dec_state *s, unsigned char *data,
  * cases the remaining len - *cnt bytes of the previous block will
  * have to passed to this function again (if len > *cnt). In case of
  * any other return value than JBG_EOK, JBG_EOK_INTR or JBG_EAGAIN, a
- * serious problem has occured and the only function you should call
+ * serious problem has occurred and the only function you should call
  * is jbg_dec_free() in order to remove the mess (and probably
  * jbg_strerror() in order to find out what to tell the user).
  */
diff --git a/converter/other/jpeg2000/libjasper/base/jas_stream.c b/converter/other/jpeg2000/libjasper/base/jas_stream.c
index 19dc7c11..7af161d2 100644
--- a/converter/other/jpeg2000/libjasper/base/jas_stream.c
+++ b/converter/other/jpeg2000/libjasper/base/jas_stream.c
@@ -902,7 +902,7 @@ int jas_stream_copy(jas_stream_t *out, jas_stream_t *in, int n)
 	while (all || m > 0) {
 		if ((c = jas_stream_getc_macro(in)) == EOF) {
 			/* The next character of input could not be read. */
-			/* Return with an error if an I/O error occured
+			/* Return with an error if an I/O error occurred
 			  (not including EOF) or if an explicit copy count
 			  was specified. */
 			return (!all || jas_stream_error(in)) ? (-1) : 0;
diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_bs.h b/converter/other/jpeg2000/libjasper/jpc/jpc_bs.h
index f515972b..edb0a2df 100644
--- a/converter/other/jpeg2000/libjasper/jpc/jpc_bs.h
+++ b/converter/other/jpeg2000/libjasper/jpc/jpc_bs.h
@@ -149,7 +149,7 @@
 #define	JPC_BITSTREAM_NOCLOSE	0x01
 /* End of file has been reached while reading. */
 #define	JPC_BITSTREAM_EOF	0x02
-/* An I/O error has occured. */
+/* An I/O error has occurred. */
 #define	JPC_BITSTREAM_ERR	0x04
 
 /******************************************************************************\
diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_cs.h b/converter/other/jpeg2000/libjasper/jpc/jpc_cs.h
index 07a046d1..4bff677c 100644
--- a/converter/other/jpeg2000/libjasper/jpc/jpc_cs.h
+++ b/converter/other/jpeg2000/libjasper/jpc/jpc_cs.h
@@ -188,7 +188,7 @@ typedef struct {
 	/* The tile number. */
 	uint_fast16_t tileno;
 
-	/* The combined length of the marker segment and its auxilary data
+	/* The combined length of the marker segment and its auxiliary data
 	  (i.e., packet data). */
 	uint_fast32_t len;
 
diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_dec.h b/converter/other/jpeg2000/libjasper/jpc/jpc_dec.h
index 5231048d..02c5553d 100644
--- a/converter/other/jpeg2000/libjasper/jpc/jpc_dec.h
+++ b/converter/other/jpeg2000/libjasper/jpc/jpc_dec.h
@@ -175,7 +175,7 @@ typedef struct {
 	/* The number of streams in this list. */
 	int numstreams;
 
-	/* The maximum number of streams that can be accomodated without
+	/* The maximum number of streams that can be accommodated without
 	  growing the streams array. */
 	int maxstreams;
 
diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_t2cod.h b/converter/other/jpeg2000/libjasper/jpc/jpc_t2cod.h
index 05f41b9e..82dafcce 100644
--- a/converter/other/jpeg2000/libjasper/jpc/jpc_t2cod.h
+++ b/converter/other/jpeg2000/libjasper/jpc/jpc_t2cod.h
@@ -136,7 +136,7 @@ typedef struct {
 	/* The number of progression changes. */
 	int numpchgs;
 
-	/* The maximum number of progression changes that can be accomodated
+	/* The maximum number of progression changes that can be accommodated
 	  without growing the progression change array. */
 	int maxpchgs;
 
@@ -253,7 +253,7 @@ typedef struct {
 	/* The progression change list. */
 	jpc_pchglist_t *pchglist;
 
-	/* The progression to use in the absense of explicit specification. */
+	/* The progression to use in the absence of explicit specification. */
 	jpc_pchg_t defaultpchg;
 
 	/* The current progression change number. */
diff --git a/converter/other/jpegtopnm.c b/converter/other/jpegtopnm.c
index 790abff2..cbac0a09 100644
--- a/converter/other/jpegtopnm.c
+++ b/converter/other/jpegtopnm.c
@@ -22,7 +22,7 @@
     Extend pamtoppm to convert this to ppm using the standard
     transformation.
 
-    See if additional decompressor options effects signficant speedup.
+    See if additional decompressor options effects significant speedup.
     grayscale output of color image, downscaling, color quantization, and
     dithering are possibilities.  Djpeg's man page says they make it faster.
 
diff --git a/converter/other/pamtopnm.c b/converter/other/pamtopnm.c
index 8bb45192..ba655b1e 100644
--- a/converter/other/pamtopnm.c
+++ b/converter/other/pamtopnm.c
@@ -69,11 +69,11 @@ validateTupleType(struct pam const inpam,
 /*----------------------------------------------------------------------------
    Make sure the image has a tuple type we know how to convert to PNM.
 
-   We're quite liberal, trying to accomodate all sorts of future
+   We're quite liberal, trying to accommodate all sorts of future
    twists on the formats.  If the tuple type _starts with_
    BLACKANDWHITE, GRAYSCALE, or RGB, and has at least as many planes
    as we'd need to convert to PBM, PGM, or PPM, respectively, we
-   accept it.  We thus accomodate variations on these formats that add
+   accept it.  We thus accommodate variations on these formats that add
    planes and add to the right end of the tuple type to explain them.
 
    If Callers specified 'assumeTupleType', we're even more liberal.
diff --git a/converter/other/pnmtopng.c b/converter/other/pnmtopng.c
index 4b18bdf3..3e41e64d 100644
--- a/converter/other/pnmtopng.c
+++ b/converter/other/pnmtopng.c
@@ -1643,7 +1643,7 @@ makeOneColorTransparentInPalette(xel            const transColor,
         *transSizeP = 1;
         if (verbose) {
             pixel const p = palette_pnm[0];
-            pm_message("Making all occurences of color (%u, %u, %u) "
+            pm_message("Making all occurrences of color (%u, %u, %u) "
                        "transparent.",
                        PPM_GETR(p), PPM_GETG(p), PPM_GETB(p));
         }
diff --git a/converter/other/sunicontopnm.c b/converter/other/sunicontopnm.c
index 005b4491..ad5aa0f8 100644
--- a/converter/other/sunicontopnm.c
+++ b/converter/other/sunicontopnm.c
@@ -13,7 +13,7 @@
 /*
   Most icon images are monochrome: Depth=1
   Depth=8 images are extremely rare.  At least some of these are color
-  images but we can't tell the pallete color order.
+  images but we can't tell the palette color order.
   Output will be in pgm.  Convert to ppm with pgmtoppm or pamlookup
   if necessary.
 */
diff --git a/converter/other/xwdtopnm.c b/converter/other/xwdtopnm.c
index f96b2fe4..d49a2b09 100644
--- a/converter/other/xwdtopnm.c
+++ b/converter/other/xwdtopnm.c
@@ -837,7 +837,7 @@ typedef struct {
 
            'nBitsLeft' tells how many bits are in the buffer now.  It's
            zero when nothing has ever been read from the file.  Only
-           the least signficant 'nBitsLeft' bits are meaningful.
+           the least significant 'nBitsLeft' bits are meaningful.
 
            The numeric value of the member is the number whose pure
            binary representation is the bit string in the buffer.
@@ -974,7 +974,7 @@ readItem(pixelReader * const rdrP) {
 
 static unsigned long const lsbmask[] = {
 /*----------------------------------------------------------------------------
-   lsbmask[i] is the mask you use to select the i least signficant bits
+   lsbmask[i] is the mask you use to select the i least significant bits
    of a bit string.
 -----------------------------------------------------------------------------*/
     0x00000000,
diff --git a/converter/pbm/pbmtolj.c b/converter/pbm/pbmtolj.c
index 4afa4c6d..89dcb76c 100644
--- a/converter/pbm/pbmtolj.c
+++ b/converter/pbm/pbmtolj.c
@@ -162,7 +162,7 @@ putinit(struct cmdlineInfo const cmdline) {
     /* Set raster graphics resolution */
     printf("\033*t%dR", cmdline.dpi);
 
-    /* Start raster graphics, relative adressing */
+    /* Start raster graphics, relative addressing */
     printf("\033*r1A");
 
     bitsperitem = 1;
diff --git a/converter/ppm/ilbmtoppm.c b/converter/ppm/ilbmtoppm.c
index a1aae7f4..a898d705 100644
--- a/converter/ppm/ilbmtoppm.c
+++ b/converter/ppm/ilbmtoppm.c
@@ -9,7 +9,7 @@
 ** documentation.  This software is provided "as is" without express or
 ** implied warranty.
 **
-** Modified by Mark Thompson on 10/4/90 to accomodate 24-bit IFF files
+** Modified by Mark Thompson on 10/4/90 to accommodate 24-bit IFF files
 ** as used by ASDG, NewTek, etc.
 **
 ** Modified by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de)
diff --git a/converter/ppm/pc1toppm.c b/converter/ppm/pc1toppm.c
index 5ba247e9..ec6678a4 100644
--- a/converter/ppm/pc1toppm.c
+++ b/converter/ppm/pc1toppm.c
@@ -170,7 +170,7 @@ writePpm(FILE *         const ofP,
            is represented by 4 shorts (16 bit integers).  The
            first is for Plane 0, the second for Plane 1, etc.  Each short
            contains the bits for that plane for each of the 16 columns,
-           arranged from most signficant bit to least in increasing column
+           arranged from most significant bit to least in increasing column
            number.
         */
         unsigned int col0ScreenIndex = cols/16*planes * row;
diff --git a/converter/ppm/pcxtoppm.c b/converter/ppm/pcxtoppm.c
index b6369806..8b8ee7d5 100644
--- a/converter/ppm/pcxtoppm.c
+++ b/converter/ppm/pcxtoppm.c
@@ -539,7 +539,7 @@ pcx_256col_to_ppm(FILE *       const ifP,
 
     /*
      * 256 color images have their color map at the end of the file
-     * preceeded by a magic byte
+     * preceded by a magic byte
      */
     colormapSignature = GetByte(ifP);
     if (colormapSignature != PCX_256_COLORS)
diff --git a/converter/ppm/picttoppm.c b/converter/ppm/picttoppm.c
index f3c9ffb0..43b8d1ef 100644
--- a/converter/ppm/picttoppm.c
+++ b/converter/ppm/picttoppm.c
@@ -2543,7 +2543,7 @@ interpretCompressedLine(unsigned char * const linebuf,
   So with 200 being the cutoff, it's actually impossible to represent some 
   16 bpp images with 200 pixels per row.
 
-  We have not been able to find an offical spec for PICT.
+  We have not been able to find an official spec for PICT.
 
   Some day, we may have to make a user option for this.
 */
@@ -3191,7 +3191,7 @@ frameSameRect(struct canvas * const canvasP,
 
 
 
-/* a stupid shell sort - I'm so embarassed  */
+/* a stupid shell sort - I'm so embarrassed  */
 
 static void 
 poly_sort(int const sort_index, struct Point points[]) {
diff --git a/converter/ppm/ppmtoilbm.c b/converter/ppm/ppmtoilbm.c
index 5de167dc..69784b37 100644
--- a/converter/ppm/ppmtoilbm.c
+++ b/converter/ppm/ppmtoilbm.c
@@ -1406,13 +1406,13 @@ void ppm_to_pchg()
 /*
     read first slice
     build a colormap from this slice
-    select upto <maxcolors> colors
+    select up to <maxcolors> colors
     build colormap from selected colors
     map slice to colormap
     write slice
     while( !finished ) {
         read next slice
-        compute distances for each pixel and select upto
+        compute distances for each pixel and select up to
             <maxchangesperslice> unused colors in this slice
         modify selected colors to the ones with maximum(?) distance
         map slice to colormap
diff --git a/converter/ppm/ppmtompeg/BUGS b/converter/ppm/ppmtompeg/BUGS
index 64269dfb..9724014e 100644
--- a/converter/ppm/ppmtompeg/BUGS
+++ b/converter/ppm/ppmtompeg/BUGS
@@ -14,7 +14,7 @@ Known BUGS:
      REFERENCE_FRAME	DECODED
    does not work
 
-5. Cannot use both STDIN and CDL_FILEs (ok, since it doesnt make sense...)
+5. Cannot use both STDIN and CDL_FILEs (ok, since it doesn't make sense...)
 
 6. <fixed>
 
diff --git a/converter/ppm/ppmtompeg/CHANGES b/converter/ppm/ppmtompeg/CHANGES
index fffa7a65..efb8fdcf 100644
--- a/converter/ppm/ppmtompeg/CHANGES
+++ b/converter/ppm/ppmtompeg/CHANGES
@@ -28,7 +28,7 @@ Changes chronology
 	- non-integer frame rates now work for all machines
 	- fixed parsing of -mv_histogram
 	- fixed numPadding bug (file name problem)
-	- fixed full pixel assertation bug
+	- fixed full pixel assertion bug
         - corrected ASPECT_RATIO bug (was forced to 1)
 	- buffer size is now set correctly
         - complains when file is too small
diff --git a/converter/ppm/ppmtompeg/bitio.c b/converter/ppm/ppmtompeg/bitio.c
index e0dc4d4e..e02fe985 100644
--- a/converter/ppm/ppmtompeg/bitio.c
+++ b/converter/ppm/ppmtompeg/bitio.c
@@ -245,7 +245,7 @@ Bitio_Write(BitBucket * const bbPtr,
 
     /*
      * Clear top bits if not part of data, necessary due to down and
-     * dirty calls of Bitio_Write with unecessary top bits set.
+     * dirty calls of Bitio_Write with unnecessary top bits set.
      */
 
     bits &= lower_mask[nbits];
diff --git a/converter/ppm/ppmtompeg/bsearch.c b/converter/ppm/ppmtompeg/bsearch.c
index 70edfef6..db34d95b 100644
--- a/converter/ppm/ppmtompeg/bsearch.c
+++ b/converter/ppm/ppmtompeg/bsearch.c
@@ -43,7 +43,7 @@
  * Changed copyrights
  *
  * Revision 1.6  1994/12/07  00:40:36  smoot
- * Added seperate P and B search ranges
+ * Added separate P and B search ranges
  *
  * Revision 1.5  1994/03/15  00:27:11  keving
  * nothing
diff --git a/converter/ppm/ppmtompeg/docs/template.param b/converter/ppm/ppmtompeg/docs/template.param
index 66b6dd98..78ad5300 100644
--- a/converter/ppm/ppmtompeg/docs/template.param
+++ b/converter/ppm/ppmtompeg/docs/template.param
@@ -18,7 +18,7 @@
 # files in the order in which they must appear, followed by 'END_INPUT'
 #
 # Also, if you use the `command` method of generating input file names,
-# the command will only be executed in the INPUT_DIR if INPUT_DIR preceeds
+# the command will only be executed in the INPUT_DIR if INPUT_DIR precedes
 # the INPUT parameter.
 #
 # <option> MUST be in UPPER CASE
diff --git a/converter/ppm/ppmtompeg/examples/template.param b/converter/ppm/ppmtompeg/examples/template.param
index 66b6dd98..78ad5300 100644
--- a/converter/ppm/ppmtompeg/examples/template.param
+++ b/converter/ppm/ppmtompeg/examples/template.param
@@ -18,7 +18,7 @@
 # files in the order in which they must appear, followed by 'END_INPUT'
 #
 # Also, if you use the `command` method of generating input file names,
-# the command will only be executed in the INPUT_DIR if INPUT_DIR preceeds
+# the command will only be executed in the INPUT_DIR if INPUT_DIR precedes
 # the INPUT parameter.
 #
 # <option> MUST be in UPPER CASE
diff --git a/converter/ppm/ppmtompeg/headers/all.h b/converter/ppm/ppmtompeg/headers/all.h
index e350aab8..5c559528 100644
--- a/converter/ppm/ppmtompeg/headers/all.h
+++ b/converter/ppm/ppmtompeg/headers/all.h
@@ -33,7 +33,7 @@
  * added little_endian force for irizx
  *
  * Revision 1.8  1995/02/02  22:02:18  smoot
- * added ifdefs for compatability on stranger and stranger architectures...
+ * added ifdefs for compatibility on stranger and stranger architectures...
  *
  * Revision 1.7  1995/02/02  07:26:45  eyhung
  * added parens to all.h to remove compiler warning
diff --git a/converter/ppm/ppmtompeg/headers/motion_search.h b/converter/ppm/ppmtompeg/headers/motion_search.h
index 62f3abab..117b914a 100644
--- a/converter/ppm/ppmtompeg/headers/motion_search.h
+++ b/converter/ppm/ppmtompeg/headers/motion_search.h
@@ -140,7 +140,7 @@ extern int psearchAlg;
  *  Changed copyrights
  *
  * Revision 1.4  1994/12/07  00:42:01  smoot
- * Added seperate P and B search ranges
+ * Added separate P and B search ranges
  *
  * Revision 1.3  1994/11/12  02:12:58  keving
  * nothing
diff --git a/converter/ppm/ppmtompeg/headers/rate.h b/converter/ppm/ppmtompeg/headers/rate.h
index df5ca1cc..8d691174 100644
--- a/converter/ppm/ppmtompeg/headers/rate.h
+++ b/converter/ppm/ppmtompeg/headers/rate.h
@@ -64,7 +64,7 @@ targetRateControl(MpegFrame * const frameP);
  * MB_RateOut
  *
  *      Prints out sampling of MB rate control data.  Every "nth" block
- *	stats are printed, with "n" controled by global RC_MB_SAMPLE_RATE
+ *	stats are printed, with "n" controlled by global RC_MB_SAMPLE_RATE
  *
  * RETURNS:     nothing
  *===========================================================================*/
diff --git a/converter/ppm/ppmtompeg/jpeg.c b/converter/ppm/ppmtompeg/jpeg.c
index 2567666d..990317a2 100644
--- a/converter/ppm/ppmtompeg/jpeg.c
+++ b/converter/ppm/ppmtompeg/jpeg.c
@@ -101,7 +101,7 @@ JMovie2JPEG(const char * const infilename,
     char ofname[256];     /* output filename string */
     int Temp = 0, temp = 0;   /* dummy variables */
     int image_offset = 0;     /* counting variable */
-    /* J_Movie header infomation */
+    /* J_Movie header information */
     int ver_no;           /* version number - expected to be 2 */
     int fps;              /* frame rate - frames per second */
     int no_frames;        /* total number of frames in jmovie */
@@ -500,7 +500,7 @@ ReadJPEG(MpegFrame * const mf,
 
         (void) jpeg_read_raw_data(&cinfo, scanarray, buffer_height);
 
-        /* alter subsample ratio's if neccessary */
+        /* alter subsample ratio's if necessary */
         if ((h_samp[0]==2) && (h_samp[1]==1) && (h_samp[2]==1) &&
             (v_samp[0]==2) && (v_samp[1]==1) && (v_samp[2]==1)) {
             /* we are 4:1:1 as expected by the encoder*/
diff --git a/converter/ppm/ppmtompeg/opts.c b/converter/ppm/ppmtompeg/opts.c
index c4d0c0b3..5b92d829 100644
--- a/converter/ppm/ppmtompeg/opts.c
+++ b/converter/ppm/ppmtompeg/opts.c
@@ -255,7 +255,7 @@ SetupLocalDCT(const char * const charPtr)
  *
  * SetupLaplace
  *
- *     Setup encoder to find distrubution for I-frames, and use for -snr
+ *     Setup encoder to find distribution for I-frames, and use for -snr
  *
  * RETURNS:	nothing
  *
diff --git a/converter/ppm/ppmtompeg/psearch.c b/converter/ppm/ppmtompeg/psearch.c
index 83c62d04..3cca1241 100644
--- a/converter/ppm/ppmtompeg/psearch.c
+++ b/converter/ppm/ppmtompeg/psearch.c
@@ -962,7 +962,7 @@ ShowBFMVHistogram(fpointer)
  * Changed copyrights
  *
  * Revision 1.8  1994/12/07  00:40:36  smoot
- * Added seperate P and B search ranges
+ * Added separate P and B search ranges
  *
  * Revision 1.7  1994/11/12  02:09:45  eyhung
  * full pixel bug
diff --git a/converter/ppm/ppmtompeg/rate.c b/converter/ppm/ppmtompeg/rate.c
index 0f1bcac1..d92afb64 100644
--- a/converter/ppm/ppmtompeg/rate.c
+++ b/converter/ppm/ppmtompeg/rate.c
@@ -595,7 +595,7 @@ updateRateControl(int const type) {
  * MB_RateOut
  *
  *      Prints out sampling of MB rate control data.  Every "nth" block
- *	stats are printed, with "n" controled by global RC_MB_SAMPLE_RATE
+ *	stats are printed, with "n" controlled by global RC_MB_SAMPLE_RATE
  *	(NB. "skipped" blocks do not go through this function and thus do not
  *		show up in the sample )
  *
diff --git a/converter/ppm/ppmtompeg/specifics.c b/converter/ppm/ppmtompeg/specifics.c
index 38e8fc43..d2093e7f 100644
--- a/converter/ppm/ppmtompeg/specifics.c
+++ b/converter/ppm/ppmtompeg/specifics.c
@@ -91,7 +91,7 @@ version N
   Specify the version of the specifics file format (this is 1)
 frame N T M
   Sets frame number N to type T and Qscale M
-  (type T is I,B,P,other, other means unspec.  I recomend - )
+  (type T is I,B,P,other, other means unspec.  I recommend - )
 slice M Q
   Sets slice M (in frame N as defined by a previous frame command)
   to qscale Q
@@ -559,7 +559,7 @@ int start_qs;
       } else {
 	/* if not next, check from the start.
 	   (this allows people to put frames out of order,even
-	   though the spec doesnt allow it.) */
+	   though the spec doesn't allow it.) */
 	tmp = fsl;
 	found_it = FALSE;
 	while (tmp != (FrameSpecList *) NULL) {
diff --git a/converter/ppm/ppmtowinicon.c b/converter/ppm/ppmtowinicon.c
index faa6a5ac..836c55d8 100644
--- a/converter/ppm/ppmtowinicon.c
+++ b/converter/ppm/ppmtowinicon.c
@@ -675,7 +675,7 @@ addEntryToIcon(MS_Ico       const MSIconData,
     * All the icons I found seemed to pad the palette to the max entries
     * for that bitdepth.
     * 
-    * The spec indicates this isn't neccessary, but I'll follow this behaviour
+    * The spec indicates this isn't necessary, but I'll follow this behaviour
     * just in case.
     */
     if (colors < 3) {
diff --git a/converter/ppm/xim.h b/converter/ppm/xim.h
index ffe60fb6..27556b30 100644
--- a/converter/ppm/xim.h
+++ b/converter/ppm/xim.h
@@ -112,7 +112,7 @@ typedef struct XimAsciiHeader {
 /* Note:
 * - All data is in char's in order to maintain easily portability
 *   across machines, and some human readibility.
-* - Images may be stored as pixmaps (8 bits/pixel) or as seperate
+* - Images may be stored as pixmaps (8 bits/pixel) or as separate
 *   red, green, blue channel data (24+ bits/pixel).
 * - An alpha channel is optional and is found after every num_channels
 *   of data.
diff --git a/converter/ppm/ximtoppm.c b/converter/ppm/ximtoppm.c
index 92827dd3..ce5e6396 100644
--- a/converter/ppm/ximtoppm.c
+++ b/converter/ppm/ximtoppm.c
@@ -208,7 +208,7 @@ ReadImageChannel(FILE *         const infp,
             }
             marker += i;
         }
-        /* return to the begining of the next image's bufffer */
+        /* return to the beginning of the next image's bufffer */
         if (fseek(infp, marker, 0) == -1) {
             pm_message("ReadImageChannel: can't fseek to location in image buffer" );
             return(0);