diff --git a/docbook/wsug_src/WSUG_chapter_advanced.adoc b/docbook/wsug_src/WSUG_chapter_advanced.adoc
index 5f884eb038..70de78adae 100644
--- a/docbook/wsug_src/WSUG_chapter_advanced.adoc
+++ b/docbook/wsug_src/WSUG_chapter_advanced.adoc
@@ -493,7 +493,7 @@ image::wsug_graphics/ws-tcp-analysis.png[{screenshot-attrs}]
TCP Analysis flags are added to the TCP protocol tree under “SEQ/ACK
analysis”. Each flag is described below. Terms such as “next expected
-sequence number” and “next expected acknowledgement number” refer to
+sequence number” and “next expected acknowledgment number” refer to
the following”:
// tcp_analyze_seq_info->nextseq
@@ -504,7 +504,7 @@ previous packet in the same TCP flow. Note that this may not be the same
as the tcp.nxtseq protocol field.
// tcp_analyze_seq_info->maxseqtobeacked
-Next expected acknowledgement number:: The last-seen sequence number for
+Next expected acknowledgment number:: The last-seen sequence number for
segments. Set when there are no analysis flags and for zero window probes.
// tcp_analyze_seq_info->lastack
@@ -519,12 +519,12 @@ that this is not the same as the next expected acknowledgment number.
[discrete]
==== TCP ACKed unseen segment
-Set when the expected next acknowledgement number is set for the reverse
-direction and it’s less than the current acknowledgement number.
+Set when the expected next acknowledgment number is set for the reverse
+direction and it’s less than the current acknowledgment number.
// TCP_A_DUPLICATE_ACK
[discrete]
-==== TCP Dup ACK ____#____
+==== TCP Dup ACK ____#____
Set when all of the following are true:
@@ -543,8 +543,8 @@ Set when all of the following are true:
* In the forward direction, the segment size is greater than zero or the SYN or FIN is set.
* The next expected sequence number is greater than the current sequence number.
* We have more than two duplicate ACKs in the reverse direction.
-* The current sequence number equals the next expected acknowledgement number.
-* We saw the last acknowledgement less than 20ms ago.
+* The current sequence number equals the next expected acknowledgment number.
+* We saw the last acknowledgment less than 20ms ago.
Supersedes “Out-Of-Order” and “Retransmission”.
@@ -568,7 +568,7 @@ Set when all of the following are true:
* The segment size is zero.
* The window size is non-zero and hasn’t changed.
* The current sequence number is the same as the next expected sequence number.
-* The current acknowledgement number is the same as the last-seen acknowledgement number.
+* The current acknowledgment number is the same as the last-seen acknowledgment number.
* The most recently seen packet in the reverse direction was a keepalive.
* The packet is not a SYN, FIN, or RST.
@@ -611,8 +611,8 @@ direction. Set when all of the following are true:
* The SYN or FIN flag is set.
* This is not a keepalive packet.
* The segment length is greater than zero.
-* Data for this flow has been acknowledged. That is, the last-seen acknowledgement number has been set.
-* The next sequence number is less than or equal to the last-seen acknowledgement number.
+* Data for this flow has been acknowledged. That is, the last-seen acknowledgment number has been set.
+* The next sequence number is less than or equal to the last-seen acknowledgment number.
Supersedes “Fast Retransmission”, “Out-Of-Order”, and “Retransmission”.
@@ -643,7 +643,7 @@ Set when the all of the following are true:
* The segment size is zero.
* The window size is non-zero and not equal to the last-seen window size.
* The sequence number is equal to the next expected sequence number.
-* The acknowledgement number is equal to the last-seen acknowledgement number.
+* The acknowledgment number is equal to the last-seen acknowledgment number.
* None of SYN, FIN, or RST are set.
// TCP_A_ZERO_WINDOW
@@ -683,7 +683,7 @@ Set when the all of the following are true:
* The segment size is zero.
* The window size is zero.
* The sequence number is equal to the next expected sequence number.
-* The acknowledgement number is equal to the last-seen acknowledgement number.
+* The acknowledgment number is equal to the last-seen acknowledgment number.
* The last-seen packet in the reverse direction was a zero window probe.
Supersedes “TCP Dup ACK”.
diff --git a/docbook/wsug_src/WSUG_chapter_statistics.adoc b/docbook/wsug_src/WSUG_chapter_statistics.adoc
index 2fdba015ac..a567e74ba2 100644
--- a/docbook/wsug_src/WSUG_chapter_statistics.adoc
+++ b/docbook/wsug_src/WSUG_chapter_statistics.adoc
@@ -800,13 +800,13 @@ Illustrated” series of books.
Time Sequence (tcptrace):: Shows TCP metrics similar to the
http://www.tcptrace.org/[tcptrace] utility, including forward segments,
-acknowledgements, selective acknowledgements, reverse window sizes, and
+acknowledgments, selective acknowledgments, reverse window sizes, and
zero windows.
Throughput:: Average throughput and goodput.
Round Trip Time:: Round trip time vs time or sequence number. RTT is
-based on the acknowledgement timestamp corresponding to a particular
+based on the acknowledgment timestamp corresponding to a particular
segment.
Window Scaling:: Window size and outstanding bytes.