diff --git a/sys/dev/ti/if_ti.c b/sys/dev/ti/if_ti.c
index b13f1ba79dba..818d6a26a706 100644
--- a/sys/dev/ti/if_ti.c
+++ b/sys/dev/ti/if_ti.c
@@ -1559,7 +1559,7 @@ static int ti_attach(dev)
 	 * Get station address from the EEPROM. Note: the manual states
 	 * that the MAC address is at offset 0x8c, however the data is
 	 * stored as two longwords (since that's how it's loaded into
-	 * the NIC). This means the MAC address is actually preceeded
+	 * the NIC). This means the MAC address is actually preceded
 	 * by two zero bytes. We need to skip over those.
 	 */
 	if (ti_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr,
diff --git a/sys/kern/subr_module.c b/sys/kern/subr_module.c
index 70e0e5f48d23..ce74eca99d20 100644
--- a/sys/kern/subr_module.c
+++ b/sys/kern/subr_module.c
@@ -177,7 +177,7 @@ preload_search_info(caddr_t mod, int inf)
 	
 	/* 
 	 * Attribute match? Return pointer to data.
-	 * Consumer may safely assume that size value preceeds	
+	 * Consumer may safely assume that size value precedes	
 	 * data.
 	 */
 	if (hdr[0] == inf)
diff --git a/sys/netatm/uni/unisig_decode.c b/sys/netatm/uni/unisig_decode.c
index 1d0bb5b8d580..040ff717af9e 100644
--- a/sys/netatm/uni/unisig_decode.c
+++ b/sys/netatm/uni/unisig_decode.c
@@ -2265,7 +2265,7 @@ usf_dec_ie_uimp(usf, ie)
  * Decode an information element using field identifiers
  *
  * The AAL parameters and ATM user cell rate IEs are formatted
- * with a one-byte identifier preceeding each field.  The routine
+ * with a one-byte identifier preceding each field.  The routine
  * parses these IEs by using a table which relates the field
  * identifiers with the fields in the appropriate IE structure.
  * Field order in the received message is immaterial.
diff --git a/sys/netatm/uni/unisig_encode.c b/sys/netatm/uni/unisig_encode.c
index 227130a75ac8..2b369c4bbe2e 100644
--- a/sys/netatm/uni/unisig_encode.c
+++ b/sys/netatm/uni/unisig_encode.c
@@ -1501,7 +1501,7 @@ usf_enc_ie_uimp(usf, ie)
  * Encode an information element using field identifiers
  *
  * The AAL parameters and ATM user cell rate IEs are formatted
- * with a one-byte identifier preceeding each field.  The routine
+ * with a one-byte identifier preceding each field.  The routine
  * encodes these IEs by using a table which relates the field
  * identifiers with the fields in the appropriate IE structure.
  *
diff --git a/sys/netgraph/ng_base.c b/sys/netgraph/ng_base.c
index e1390415dd6b..177aeadc7ae8 100644
--- a/sys/netgraph/ng_base.c
+++ b/sys/netgraph/ng_base.c
@@ -370,7 +370,7 @@ DEFINE_PARSE_STRUCT_TYPE(typeinfo, TYPEINFO, ());
 DEFINE_PARSE_STRUCT_TYPE(linkinfo, LINKINFO, (&ng_generic_nodeinfo_type));
 
 /* Get length of an array when the length is stored as a 32 bit
-   value immediately preceeding the array -- as with struct namelist
+   value immediately preceding the array -- as with struct namelist
    and struct typelist. */
 static int
 ng_generic_list_getLength(const struct ng_parse_type *type,
diff --git a/sys/nfs/nfs_serv.c b/sys/nfs/nfs_serv.c
index 1fdb78b0d1ef..e015d1795fcd 100644
--- a/sys/nfs/nfs_serv.c
+++ b/sys/nfs/nfs_serv.c
@@ -3264,7 +3264,7 @@ nfsrv_readdir(nfsd, slp, procp, mrq)
 	/*
 	 * For some reason FreeBSD's ufs_readdir() chooses to back the
 	 * directory offset up to a block boundary, so it is necessary to
-	 * skip over the records that preceed the requested offset. This
+	 * skip over the records that precede the requested offset. This
 	 * requires the assumption that file offset cookies monotonically
 	 * increase.
 	 */
@@ -3538,7 +3538,7 @@ nfsrv_readdirplus(nfsd, slp, procp, mrq)
 	/*
 	 * For some reason FreeBSD's ufs_readdir() chooses to back the
 	 * directory offset up to a block boundary, so it is necessary to
-	 * skip over the records that preceed the requested offset. This
+	 * skip over the records that precede the requested offset. This
 	 * requires the assumption that file offset cookies monotonically
 	 * increase.
 	 */
diff --git a/sys/nfsserver/nfs_serv.c b/sys/nfsserver/nfs_serv.c
index 1fdb78b0d1ef..e015d1795fcd 100644
--- a/sys/nfsserver/nfs_serv.c
+++ b/sys/nfsserver/nfs_serv.c
@@ -3264,7 +3264,7 @@ nfsrv_readdir(nfsd, slp, procp, mrq)
 	/*
 	 * For some reason FreeBSD's ufs_readdir() chooses to back the
 	 * directory offset up to a block boundary, so it is necessary to
-	 * skip over the records that preceed the requested offset. This
+	 * skip over the records that precede the requested offset. This
 	 * requires the assumption that file offset cookies monotonically
 	 * increase.
 	 */
@@ -3538,7 +3538,7 @@ nfsrv_readdirplus(nfsd, slp, procp, mrq)
 	/*
 	 * For some reason FreeBSD's ufs_readdir() chooses to back the
 	 * directory offset up to a block boundary, so it is necessary to
-	 * skip over the records that preceed the requested offset. This
+	 * skip over the records that precede the requested offset. This
 	 * requires the assumption that file offset cookies monotonically
 	 * increase.
 	 */
diff --git a/sys/pc98/i386/userconfig.c b/sys/pc98/i386/userconfig.c
index 031df5352279..1a8821f37773 100644
--- a/sys/pc98/i386/userconfig.c
+++ b/sys/pc98/i386/userconfig.c
@@ -2131,7 +2131,7 @@ dolist(int row, int num, int detail, int *ofs, DEV_LIST **list, char *dhelp)
 		extended=1;
 		break;
 		    
-	    case '[':				/* cheat : always preceeds cursor move */
+	    case '[':				/* cheat : always precedes cursor move */
 	    case 'O':				/* ANSI application key mode */
 		if (extended==1)
 		    extended=2;
@@ -2923,7 +2923,7 @@ introfunc(CmdParm *parms)
 		extended = 1;
 		break;
 		    
-	    case '[':				/* cheat : always preceeds cursor move */
+	    case '[':				/* cheat : always precedes cursor move */
 	    case 'O':				/* ANSI application key mode */
 		if (extended == 1)
 		    extended = 2;
diff --git a/sys/pci/if_rl.c b/sys/pci/if_rl.c
index 850d9959aacd..100cf5a33986 100644
--- a/sys/pci/if_rl.c
+++ b/sys/pci/if_rl.c
@@ -1054,7 +1054,7 @@ static int rl_list_tx_init(sc)
  * attempt to document it here. The driver provides a buffer area and
  * places its base address in the RX buffer start address register.
  * The chip then begins copying frames into the RX buffer. Each frame
- * is preceeded by a 32-bit RX status word which specifies the length
+ * is preceded by a 32-bit RX status word which specifies the length
  * of the frame and certain other status bits. Each frame (starting with
  * the status word) is also 32-bit aligned. The frame length is in the
  * first 16 bits of the status word; the lower 15 bits correspond with
diff --git a/sys/pci/if_ti.c b/sys/pci/if_ti.c
index b13f1ba79dba..818d6a26a706 100644
--- a/sys/pci/if_ti.c
+++ b/sys/pci/if_ti.c
@@ -1559,7 +1559,7 @@ static int ti_attach(dev)
 	 * Get station address from the EEPROM. Note: the manual states
 	 * that the MAC address is at offset 0x8c, however the data is
 	 * stored as two longwords (since that's how it's loaded into
-	 * the NIC). This means the MAC address is actually preceeded
+	 * the NIC). This means the MAC address is actually preceded
 	 * by two zero bytes. We need to skip over those.
 	 */
 	if (ti_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr,
diff --git a/sys/ufs/ffs/ffs_alloc.c b/sys/ufs/ffs/ffs_alloc.c
index c7c318433096..6fe3b2f8c870 100644
--- a/sys/ufs/ffs/ffs_alloc.c
+++ b/sys/ufs/ffs/ffs_alloc.c
@@ -336,7 +336,7 @@ SYSCTL_NODE(_vfs, OID_AUTO, ffs, CTLFLAG_RW, 0, "FFS filesystem");
  * logical blocks to be made contiguous is given. The allocator attempts
  * to find a range of sequential blocks starting as close as possible to
  * an fs_rotdelay offset from the end of the allocation for the logical
- * block immediately preceeding the current range. If successful, the
+ * block immediately preceding the current range. If successful, the
  * physical block numbers in the buffer pointers and in the inode are
  * changed to reflect the new allocation. If unsuccessful, the allocation
  * is left unchanged. The success in doing the reallocation is returned.
diff --git a/tools/tools/kdrv/KernelDriver b/tools/tools/kdrv/KernelDriver
index b840ff48150a..60f89d82bf39 100755
--- a/tools/tools/kdrv/KernelDriver
+++ b/tools/tools/kdrv/KernelDriver
@@ -368,7 +368,7 @@ proc backoutDrvChanges {kpath} {
 # Adds an entry to i386/conf/files.i386 and conf/files for the .c files in the driver.  
 # (kpath) points to the kernel.
 #
-# A comment is added to the file preceeding the new entries :
+# A comment is added to the file preceding the new entries :
 #
 #  ## driver: <drivername>
 #  # <description>
diff --git a/usr.bin/indent/indent.c b/usr.bin/indent/indent.c
index 1a8675581134..c790720ea1c3 100644
--- a/usr.bin/indent/indent.c
+++ b/usr.bin/indent/indent.c
@@ -756,7 +756,7 @@ main(argc, argv)
 	    if (ps.in_parameter_declaration)
 		prefix_blankline_requested = 0;
 
-	    if (ps.p_l_follow > 0) {	/* check for preceeding unbalanced
+	    if (ps.p_l_follow > 0) {	/* check for preceding unbalanced
 					 * parens */
 		diag(1, "Unbalanced parens");
 		ps.p_l_follow = 0;
diff --git a/usr.bin/make/PSD.doc/tutorial.ms b/usr.bin/make/PSD.doc/tutorial.ms
index db2d04eb2fd1..7e4e8c6a5037 100644
--- a/usr.bin/make/PSD.doc/tutorial.ms
+++ b/usr.bin/make/PSD.doc/tutorial.ms
@@ -602,7 +602,7 @@ likely freeze if you execute something that produces thousands of
 bytes of output (8 Kb is the limit on many UNIX systems).
 .LP
 The value of a variable may be retrieved by enclosing the variable
-name in parentheses or curly braces and preceeding the whole thing
+name in parentheses or curly braces and preceding the whole thing
 with a dollar sign.
 .LP
 For example, to set the variable CFLAGS to the string
@@ -2640,7 +2640,7 @@ character is replaced by the
 unless it is preceded by a backslash.
 You are allowed to use any character except
 colon or exclamation point to separate the two strings. This so-called
-delimiter character may be placed in either string by preceeding it
+delimiter character may be placed in either string by preceding it
 with a backslash.
 .IP T
 .Ix 0 def :T
diff --git a/usr.bin/make/job.c b/usr.bin/make/job.c
index 916ee3f1f620..8fb15f2c512a 100644
--- a/usr.bin/make/job.c
+++ b/usr.bin/make/job.c
@@ -2115,7 +2115,7 @@ JobDoOutput(job, finish)
 	     * Need to send the output to the screen. Null terminate it
 	     * first, overwriting the newline character if there was one.
 	     * So long as the line isn't one we should filter (according
-	     * to the shell description), we print the line, preceeded
+	     * to the shell description), we print the line, preceded
 	     * by a target banner if this target isn't the same as the
 	     * one for which we last printed something.
 	     * The rest of the data in the buffer are then shifted down
diff --git a/usr.bin/make/make.1 b/usr.bin/make/make.1
index e3f1347ab49e..91a416db6582 100644
--- a/usr.bin/make/make.1
+++ b/usr.bin/make/make.1
@@ -1057,7 +1057,7 @@ any suffix so declared will have the directories on its search path (see
 .Ic .PATH )
 placed in the
 .Va .INCLUDES
-special variable, each preceeded by a
+special variable, each preceded by a
 .Fl I
 flag.
 .It Ic .INTERRUPT
diff --git a/usr.bin/make/parse.c b/usr.bin/make/parse.c
index 6304a41483ab..7dc9e61073e4 100644
--- a/usr.bin/make/parse.c
+++ b/usr.bin/make/parse.c
@@ -2281,7 +2281,7 @@ ParseReadLine ()
 
 	/*
 	 * Strip trailing blanks and tabs from the line.
-	 * Do not strip a blank or tab that is preceeded by
+	 * Do not strip a blank or tab that is preceded by
 	 * a '\'
 	 */
 	ep = line;
diff --git a/usr.bin/make/suff.c b/usr.bin/make/suff.c
index 0e58fb9ff7ef..81d4216190a7 100644
--- a/usr.bin/make/suff.c
+++ b/usr.bin/make/suff.c
@@ -846,7 +846,7 @@ Suff_GetPath (sname)
  *	The searchPath field of all the suffixes is extended by the
  *	directories in dirSearchPath. If paths were specified for the
  *	".h" suffix, the directories are stuffed into a global variable
- *	called ".INCLUDES" with each directory preceeded by a -I. The same
+ *	called ".INCLUDES" with each directory preceded by a -I. The same
  *	is done for the ".a" suffix, except the variable is called
  *	".LIBS" and the flag is -L.
  *-----------------------------------------------------------------------
diff --git a/usr.bin/make/targ.c b/usr.bin/make/targ.c
index 8e13e69f39ff..57b6b80adf3f 100644
--- a/usr.bin/make/targ.c
+++ b/usr.bin/make/targ.c
@@ -606,7 +606,7 @@ TargPrintNode (gnp, passp)
  *	0.
  *
  * Side Effects:
- *	The name of each file is printed preceeded by #\t
+ *	The name of each file is printed preceded by #\t
  *
  *-----------------------------------------------------------------------
  */
diff --git a/usr.sbin/moused/moused.c b/usr.sbin/moused/moused.c
index 996b02afaa4a..df3a9b0a75c8 100644
--- a/usr.sbin/moused/moused.c
+++ b/usr.sbin/moused/moused.c
@@ -1562,10 +1562,10 @@ r_protocol(u_char rBuf, mousestatus_t *act)
 
         /*
 	 * [KY-97/08/03]
-	 * Receive the fourth byte only when preceeding three bytes have
+	 * Receive the fourth byte only when preceding three bytes have
 	 * been detected (pBufP >= cur_proto[4]).  In the previous
 	 * versions, the test was pBufP == 0; thus, we may have mistakingly
-	 * received a byte even if we didn't see anything preceeding 
+	 * received a byte even if we didn't see anything preceding 
 	 * the byte.
 	 */
 
diff --git a/usr.sbin/ntp/doc/ntp.conf.5 b/usr.sbin/ntp/doc/ntp.conf.5
index 610775a51943..af4e16246489 100644
--- a/usr.sbin/ntp/doc/ntp.conf.5
+++ b/usr.sbin/ntp/doc/ntp.conf.5
@@ -1418,7 +1418,7 @@ Specifies the name and options for the serial port device
 to which the PPS signal is connected.
 Note, this command replaces use of fudge flag3,
 which was used for the same purpose in NTPv3.
-Note that this command should preceed the
+Note that this command should precede the
 .Ic server
 and
 .Ic fudge