diff --git a/man/man1/pmdacisco.1 b/man/man1/pmdacisco.1
index a948597..ed77b45 100644
--- a/man/man1/pmdacisco.1
+++ b/man/man1/pmdacisco.1
@@ -212,7 +212,7 @@ If the Cisco command prompt is different to the
 default (see
 .B \-s
 above), it may be optionally specified here by appending
-a exclamation mark (``!'') and the prompt to the end of
+an exclamation mark (``!'') and the prompt to the end of
 .IR interface-spec .
 .PP
 The following are examples of valid
diff --git a/src/include/impl.h b/src/include/impl.h
index eed1c61..248b083 100644
--- a/src/include/impl.h
+++ b/src/include/impl.h
@@ -587,7 +587,7 @@ EXTERN unsigned int *__pmPDUCntIn;
 EXTERN unsigned int *__pmPDUCntOut;
 extern void __pmSetPDUCntBuf(unsigned *, unsigned *);
 
-/* timeout ouptions for __pmGetPDU */
+/* timeout options for __pmGetPDU */
 #define TIMEOUT_NEVER	 0
 #define TIMEOUT_DEFAULT	-1
 #define GETPDU_ASYNC	-2
diff --git a/src/libpcp/src/p_fetch.c b/src/libpcp/src/p_fetch.c
index 922dcb3..7b3778e 100644
--- a/src/libpcp/src/p_fetch.c
+++ b/src/libpcp/src/p_fetch.c
@@ -43,7 +43,7 @@ __pmSendFetch(int fd, int from, int ctxnum, __pmTimeval *when, int numpmid, pmID
     pp->hdr.len = (int)need;
     pp->hdr.type = PDU_FETCH;
     /* 
-     * note: context id may be send twice due to protocol evolution and
+     * note: context id may be sent twice due to protocol evolution and
      * backwards compatibility issues
      */
     pp->hdr.from = from;
diff --git a/src/libpcp/src/p_profile.c b/src/libpcp/src/p_profile.c
index a7ba0c9..0024b53 100644
--- a/src/libpcp/src/p_profile.c
+++ b/src/libpcp/src/p_profile.c
@@ -64,7 +64,7 @@ __pmSendProfile(int fd, int from, int ctxnum, __pmProfile *instprof)
     pduProfile->hdr.len = (int)need;
     pduProfile->hdr.type = PDU_PROFILE;
     /* 
-     * note: context id may be send twice due to protocol evolution and
+     * note: context id may be sent twice due to protocol evolution and
      * backwards compatibility issues
      */
     pduProfile->hdr.from = from;
diff --git a/src/libpcp/src/pdu.c b/src/libpcp/src/pdu.c
index 4063cb6..09acd8c 100644
--- a/src/libpcp/src/pdu.c
+++ b/src/libpcp/src/pdu.c
@@ -346,7 +346,7 @@ __pmGetPDU(int fd, int mode, int timeout, __pmPDU **result)
 		 *
 		 * failed as a result of pmcd exiting and the connection
 		 * being reset, or as a result of the kernel ripping
-		 * down the connection (most likely becuase the host at
+		 * down the connection (most likely because the host at
 		 * the other end just took a dive)
 		 *
 		 * from IRIX BDS kernel sources, seems like all of the
@@ -469,9 +469,9 @@ check_read_len:
     php->from = ntohl((unsigned int)php->from);
 #ifdef PCP_DEBUG
     if (pmDebug & DBG_TRACE_PDU) {
-	int		j;
+	int	j;
 	char	*p;
-	int		jend = (php->len+(int)sizeof(__pmPDU)-1)/(int)sizeof(__pmPDU);
+	int	jend = (php->len+(int)sizeof(__pmPDU)-1)/(int)sizeof(__pmPDU);
 
 	/* for Purify ... */
 	p = (char *)*result + php->len;