diff --git a/source_code/main.c b/source_code/main.c
index e945025..607f6f1 100644
--- a/source_code/main.c
+++ b/source_code/main.c
@@ -1445,7 +1445,7 @@ main(void)
 		ASSERT( args.Service != NULL );
 
 		/* Set up the name of the program, as it will be
-		 * displayed in the proces status list.
+		 * displayed in the process status list.
 		 */
 		name = FilePart(program_name);
 
@@ -2282,7 +2282,7 @@ add_error_message(const TEXT * fmt,APTR args)
 
 /****************************************************************************/
 
-/* Report an error that has occured; if the program was not launched
+/* Report an error that has occurred; if the program was not launched
  * from Shell, error messages will be accumulated for later display.
  */
 void VARARGS68K
diff --git a/source_code/proc.c b/source_code/proc.c
index b3ecae2..89dd2ef 100644
--- a/source_code/proc.c
+++ b/source_code/proc.c
@@ -220,7 +220,7 @@ static const err_code_struct hard_msgs[] =
 	{"ERRbadunit",		20,	"Unknown unit"},
 	{"ERRnotready",		21,	"Drive not ready"},
 	{"ERRbadcmd",		22,	"Unknown command"},
-	{"ERRdata",			23,	"A problem has occured in the physical I/O"},
+	{"ERRdata",			23,	"A problem has occurred in the physical I/O"},
 	{"ERRbadreq",		24,	"Bad request structure length"},
 	{"ERRseek",			25,	"Seek error"},
 	{"ERRbadmedia",		26,	"Unknown media type"},
@@ -310,7 +310,7 @@ copy_latin1_to_utf16le(const struct smb_server *server, byte * to,int to_size, c
 	int i;
 
 	// Tygre 21/05/15: Asymmetry
-	// The arguments of this function are not symetrical
+	// The arguments of this function are not symmetrical
 	// with those of copy_utf16le_to_latin1(). While in
 	// copy_utf16le_to_latin1(), the "from" represents
 	// a single part of a path, i.e., "toto". Here, the
diff --git a/source_code/quad_math.c b/source_code/quad_math.c
index e237c1e..04e383f 100644
--- a/source_code/quad_math.c
+++ b/source_code/quad_math.c
@@ -219,7 +219,7 @@ add_64_plus_64_to_64(const QUAD * const a,const QUAD * const b,QUAD * ab)
 
 /* Subtract a 64 bit integer from another 64 bit integer, producing a
  * 64 bit integer difference, returning a 32 bit integer that indicates
- * whether or not an underflow occured.
+ * whether or not an underflow occurred.
  */
 ULONG
 subtract_64_from_64_to_64(const QUAD * const minuend,const QUAD * const subtrahend,QUAD * difference)
diff --git a/source_code/smb_abstraction.c b/source_code/smb_abstraction.c
index 936ee3e..5d8cb20 100644
--- a/source_code/smb_abstraction.c
+++ b/source_code/smb_abstraction.c
@@ -345,7 +345,7 @@ smba_connect (
 		report_error("Not enough memory.");
 
 		(*error_ptr) = ENOMEM;
-		goto error_occured;
+		goto error_occurred;
 	}
 
 	memset (res, 0, sizeof(*res));
@@ -429,7 +429,7 @@ smba_connect (
 		(*error_ptr) = ENOMEM;
 
 		report_error("Directory cache initialization failed (%ld, %s).",(*error_ptr),posix_strerror(*error_ptr));
-		goto error_occured;
+		goto error_occurred;
 	}
 
 	strlcpy(data.workgroup_name,workgroup_name,sizeof(data.workgroup_name));
@@ -441,7 +441,7 @@ smba_connect (
 	if(gethostname (hostname, MAXHOSTNAMELEN) < 0)
 	{
 		report_error("Could not look up local host name (%ld, %s).",(*error_ptr),posix_strerror(*error_ptr));
-		goto error_occured;
+		goto error_occurred;
 	}
 
 	/* Only retain the host name, drop any domain names following it. */
@@ -491,7 +491,7 @@ smba_connect (
 					report_error("Port number '%s' is out of range.", tcp_service_name);
 
 					(*error_ptr) = EINVAL;
-					goto error_occured;
+					goto error_occurred;
 				}
 			}
 			else
@@ -499,7 +499,7 @@ smba_connect (
 				report_error("Invalid service '%s'.", tcp_service_name);
 
 				(*error_ptr) = EINVAL;
-				goto error_occured;
+				goto error_occurred;
 			}
 		}
 	}
@@ -538,7 +538,7 @@ smba_connect (
 		report_error("socket() call failed (%ld, %s).", errno, posix_strerror(errno));
 
 		(*error_ptr) = errno;
-		goto error_occured;
+		goto error_occurred;
 	}
 
 	strlcpy (data.service, connect_parameters->service, sizeof(data.service));
@@ -569,7 +569,7 @@ smba_connect (
 			report_error("Server name '%s' is too long for NetBIOS (%ld characters are possible).",connect_parameters->server_ipname,16);
 
 			(*error_ptr) = ENAMETOOLONG;
-			goto error_occured;
+			goto error_occurred;
 		}
 
 		strlcpy (data.server_name, connect_parameters->server_ipname, sizeof(data.server_name));
@@ -584,7 +584,7 @@ smba_connect (
 			report_error("Local host name '%s' is too long for NetBIOS (%ld characters are possible).", hostname, 16);
 
 			(*error_ptr) = ENAMETOOLONG;
-			goto error_occured;
+			goto error_occurred;
 		}
 
 		strlcpy (data.client_name, hostname, sizeof(data.client_name));
@@ -600,7 +600,7 @@ smba_connect (
 	res->server.latin1_to_utf16le_sizes = kvs_create(strcmp);
 
 	if (smb_proc_connect (&res->server, error_ptr) < 0)
-		goto error_occured;
+		goto error_occurred;
 
 	if (!use_E)
 		res->supports_E_known = TRUE;
@@ -610,7 +610,7 @@ smba_connect (
 
 	result = 0;
 
- error_occured:
+ error_occurred:
 
 	if(res != NULL)
 	{
@@ -1811,7 +1811,7 @@ smba_readdir (smba_file_t * f, int offs, int restart, void *callback_data, smba_
 			D(("cachefill returned %ld entries", num_entries));
 
 			/* The cache may have been invalidated because an error
-			 * occured (e.g. server connection was terminated), or if
+			 * occurred (e.g. server connection was terminated), or if
 			 * the cache size was changed.
 			 */
 			if (f->dircache == NULL || !f->dircache->is_valid)