diff --git a/src/agwlib.c b/src/agwlib.c
index 337c85b..33d490c 100644
--- a/src/agwlib.c
+++ b/src/agwlib.c
@@ -321,7 +321,7 @@ static void * tnc_listen_thread (void *arg)
 	    s_tnc_sock = dwsock_connect (s_tnc_host, s_tnc_port, "TNC", 0, 0, tncaddr);
 
 	    if (s_tnc_sock != -1) {
-	      dw_printf ("Succesfully reattached to network TNC.\n");
+	      dw_printf ("Successfully reattached to network TNC.\n");
 
 	      // Might need to run TNC initialization again.
 	      // For example, a server would register its callsigns.
diff --git a/src/atest.c b/src/atest.c
index b7068cd..ee914d3 100644
--- a/src/atest.c
+++ b/src/atest.c
@@ -703,7 +703,7 @@ int main (int argc, char *argv[])
 	dw_printf ("%d packets decoded in %.3f seconds.  %.1f x realtime\n", packets_decoded_total, elapsed, total_filetime/elapsed);
 	if (d_o_opt) {
 	  dw_printf ("DCD count = %d\n", dcd_count);
-	  dw_printf ("DCD missing erors = %d\n", dcd_missing_errors);
+	  dw_printf ("DCD missing errors = %d\n", dcd_missing_errors);
 	}
 
 	if (error_if_less_than != -1 && packets_decoded_total < error_if_less_than) {
diff --git a/src/ax25_link.c b/src/ax25_link.c
index c39f5ab..988385a 100644
--- a/src/ax25_link.c
+++ b/src/ax25_link.c
@@ -2993,7 +2993,7 @@ dw_printf ("%s:%d, %d srej exceptions, V(R)=%d, N(S)=%d\n", __func__, __LINE__,
 	      if (first == AX25MODULO(S->vr - 1, S->modulo, __FILE__, __func__, __LINE__)) {
 	        //  Oops!  Went too far.  This I frame was already processed.
 		text_color_set(DW_COLOR_ERROR);
-	        dw_printf ("INTERNAL ERROR calulating what to put in SREJ, %s line %d\n", __func__, __LINE__);
+	        dw_printf ("INTERNAL ERROR calculating what to put in SREJ, %s line %d\n", __func__, __LINE__);
 	        dw_printf ("V(R)=%d, N(S)=%d, SREJ exception=%d, first=%d, ask_resend_count=%d\n", S->vr, ns, selective_reject_exception(S), first, ask_resend_count);
 		int k;
 	        for (k=0; k<128; k++) {
@@ -3146,7 +3146,7 @@ static void send_srej_frames (ax25_dlsm_t *S, int *resend, int count, int allow_
 	if (s_debug_retry) {
 	  text_color_set(DW_COLOR_INFO);
 	  dw_printf ("%s line %d\n", __func__, __LINE__);
-	  //dw_printf ("state=%d, count=%d, k=%d, V(R)=%d, SREJ exeception=%d\n", S->state, count, S->k_maxframe, S->vr, selective_reject_exception(S));
+	  //dw_printf ("state=%d, count=%d, k=%d, V(R)=%d, SREJ exception=%d\n", S->state, count, S->k_maxframe, S->vr, selective_reject_exception(S));
 	  dw_printf ("state=%d, count=%d, k=%d, V(R)=%d\n", S->state, count, S->k_maxframe, S->vr);
 
 	  dw_printf ("resend[]=");
diff --git a/src/decode_aprs.c b/src/decode_aprs.c
index d4661e0..0b59a99 100644
--- a/src/decode_aprs.c
+++ b/src/decode_aprs.c
@@ -1566,7 +1566,7 @@ static void aprs_message (decode_aprs_t *A, unsigned char *info, int ilen, int q
 	  telemetry_unit_label_message (addressee, p->message+5);
 	}
 	else if (strncmp(p->message,"EQNS.",5) == 0) {
-	  snprintf (A->g_msg_type, sizeof(A->g_msg_type), "Telemetry Equation Coefficents Message for \"%s\"", addressee);
+	  snprintf (A->g_msg_type, sizeof(A->g_msg_type), "Telemetry Equation Coefficients Message for \"%s\"", addressee);
 	  A->g_message_subtype = message_subtype_telem_eqns;
 	  telemetry_coefficents_message (addressee, p->message+5, quiet);
 	}
diff --git a/src/demod.c b/src/demod.c
index 500cf6c..e7df796 100644
--- a/src/demod.c
+++ b/src/demod.c
@@ -503,8 +503,8 @@ int demod_init (struct audio_s *pa)
 
 	        text_color_set(DW_COLOR_ERROR);
 	        dw_printf ("Two incompatible versions of 2400 bps QPSK are now available.\n");
-	        dw_printf ("For compatbility with direwolf <= 1.5, use 'V26A' modem option in config file.\n");
-	        dw_printf ("For compatbility MFJ-2400 use 'V26B' modem option in config file.\n");
+	        dw_printf ("For compatibility with direwolf <= 1.5, use 'V26A' modem option in config file.\n");
+	        dw_printf ("For compatibility MFJ-2400 use 'V26B' modem option in config file.\n");
 	        dw_printf ("Command line options -j and -J can be used for channel 0.\n");
 	        dw_printf ("For more information, read the Dire Wolf User Guide and\n");
 	        dw_printf ("2400-4800-PSK-for-APRS-Packet-Radio.pdf.\n");
diff --git a/src/kissutil.c b/src/kissutil.c
index 026a6ea..e27f4f3 100644
--- a/src/kissutil.c
+++ b/src/kissutil.c
@@ -915,7 +915,7 @@ static void usage(void)
  	dw_printf ("		a serial port.  e.g.  /dev/ttyAMA0 or COM3.\n");
  	dw_printf ("	-s	Serial port speed, default 9600.\n");
 	dw_printf ("	-v	Verbose.  Show the KISS frame contents.\n");
-	dw_printf ("	-f	Transmit files directory.  Processs and delete files here.\n");
+	dw_printf ("	-f	Transmit files directory.  Process and delete files here.\n");
 	dw_printf ("	-o	Receive output queue directory.  Store received frames here.\n");
 	dw_printf ("	-T	Precede received frames with 'strftime' format time stamp.\n");
 	usage2();
@@ -929,7 +929,7 @@ static void usage2 (void)
 	dw_printf ("Input, starting with upper case letter or digit, is assumed\n");
 	dw_printf ("to be an AX.25 frame in the usual TNC2 monitoring format.\n");
 	dw_printf ("\n");
-	dw_printf ("Input, starting with a lower case letter is a commmand.\n");
+	dw_printf ("Input, starting with a lower case letter is a command.\n");
 	dw_printf ("Whitespace, as shown in examples, is optional.\n");
 	dw_printf ("\n");
 	dw_printf ("	letter	meaning			example\n");
diff --git a/src/server.c b/src/server.c
index c6e3894..ee7f9b1 100644
--- a/src/server.c
+++ b/src/server.c
@@ -397,7 +397,7 @@ static void debug_print (fromto_t fromto, int client, struct agwpe_s *pmsg, int
 
 	if (msg_len < 36) {
 	  text_color_set (DW_COLOR_ERROR);
-	  dw_printf ("AGWPE message length, %d, is shorter than minumum 36.\n", msg_len);
+	  dw_printf ("AGWPE message length, %d, is shorter than minimum 36.\n", msg_len);
 	}
 	if (msg_len != netle2host(pmsg->data_len_NETLE) + 36) {
 	  text_color_set (DW_COLOR_ERROR);
diff --git a/src/telemetry.c b/src/telemetry.c
index d4105fd..2a6c690 100644
--- a/src/telemetry.c
+++ b/src/telemetry.c
@@ -771,7 +771,7 @@ void telemetry_coefficents_message (char *station, char *msg, int quiet)
 	    else {
 	      if ( ! quiet) {
 	        text_color_set(DW_COLOR_ERROR);
-	        dw_printf ("Equation coefficent position A%d%c is empty.\n", n/3+1, n%3+'a');
+	        dw_printf ("Equation coefficient position A%d%c is empty.\n", n/3+1, n%3+'a');
 	        dw_printf ("Some applications might not handle this correctly.\n");
 	      }
 	    }
@@ -782,7 +782,7 @@ void telemetry_coefficents_message (char *station, char *msg, int quiet)
 	if (n != T_NUM_ANALOG * 3) {
 	  if ( ! quiet) {
 	    text_color_set(DW_COLOR_ERROR);
-	    dw_printf ("Found %d equation coefficents when 15 were expected.\n", n);
+	    dw_printf ("Found %d equation coefficients when 15 were expected.\n", n);
 	    dw_printf ("Some applications might not handle this correctly.\n");
 	  }
 	}