diff --git a/Guide-GroundSystem.md b/Guide-GroundSystem.md
index 0291aee..f19081b 100644
--- a/Guide-GroundSystem.md
+++ b/Guide-GroundSystem.md
@@ -4,7 +4,7 @@
 
 The GroundSystem directory contains the new Ground System project for the cFS, that incorporates the main window to launch commands and telemetry systems, and other utilities like FDL/FUL and FT managers to send and receive files. The main window runs alongside the Routing Service (`RoutingService.py`). The Routing Service handles all incoming data and publishes (PUB/SUB) the data to specific ZeroMQ channels so that the different ground system utilities can receive (subscribe) only the desired data.
 
-This ground system supports commanding and receiving telemetry from multiple spacecrafts using UDP.
+This ground system supports commanding and receiving telemetry from multiple spacecraft using UDP.
 
 The Ground System contains the main window that lets you launch the different utilities.
 
@@ -15,11 +15,11 @@ To start receiving data from the cFS, you need to enable telemetry first. To ena
 
 Note: The Main Window needs to be opened at all times so that the telemetry messages can be forwarded to the Telemetry System.
 
-The Ground System will automatically detect the spacecraft when it starts sending the telemetry, and it will be added to the IP addresses list. You can select the spacecraft from the list, and start Telemetry System to receive its data. If 'All' spacecrafts are selected, you can start Telemetry System to display the packet count from multiple spacecrafts (if it detected more than one).
+The Ground System will automatically detect the spacecraft when it starts sending the telemetry, and it will be added to the IP addresses list. You can select the spacecraft from the list, and start Telemetry System to receive its data. If 'All' spacecraft are selected, you can start Telemetry System to display the packet count from multiple spacecraft (if it detected more than one).
 
 Future enhancements:
 
-1. Detect different spacecrafts based on telemetry header (spacecraft `id`) data instead of using the spacecraft IP address.
+1. Detect different spacecraft based on telemetry header (spacecraft `id`) data instead of using the spacecraft IP address.
 2. Add instructions for Windows.
 
 ## Install and run
@@ -94,7 +94,7 @@ Steps to adding application commands to the Ground System:
    - USE ONLY SPACES, NO TABS (Remember, it's Python).
    - Don't leave any empty lines in `command-pages.txt`, this could cause errors when running `GroundSystem.py` and `CommandSystem.py`.
 
-After completing these steps, restart the Ground System and the changes should have taken affect.
+After completing these steps, restart the Ground System and the changes should have taken effect.
 
 ## Common issues and troubleshooting
 
diff --git a/RoutingService.py b/RoutingService.py
index c5447ff..93136eb 100644
--- a/RoutingService.py
+++ b/RoutingService.py
@@ -72,7 +72,7 @@ def run(self):
                     datagram, host = self.sock.recvfrom(
                         4096)  # buffer size is 1024 bytes
 
-                    # Ignore datagram if it is not long enough (doesnt contain tlm header?)
+                    # Ignore datagram if it is not long enough (doesn't contain tlm header?)
                     if len(datagram) < 6:
                         continue
 
diff --git a/SECURITY.md b/SECURITY.md
index 17ead6f..15f0394 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -6,7 +6,7 @@ To report a vulnerability for the cFS-GroundSystem subsystem please [submit an i
 
 For general cFS vulnerabilities please [open a cFS framework issue](https://github.com/nasa/cfs/issues/new/choose) and see our [top-level security policy](https://github.com/nasa/cFS/security/policy) for additional information.
 
-In either case please use the "Bug Report" template and provide as much information as possible. Apply appropraite labels for each report. For security related reports, tag the issue with the "security" label.
+In either case please use the "Bug Report" template and provide as much information as possible. Apply appropriate labels for each report. For security related reports, tag the issue with the "security" label.
 
 ## Testing
 
diff --git a/Subsystems/cmdGui/CHeaderParser.py b/Subsystems/cmdGui/CHeaderParser.py
index c8730f5..f0e4df7 100644
--- a/Subsystems/cmdGui/CHeaderParser.py
+++ b/Subsystems/cmdGui/CHeaderParser.py
@@ -42,7 +42,7 @@
 # the user for necessary information, and parsing the cFS header files, this
 # program will generate up to two different "pickle" files for the ground
 # system to use (for information about pickle files and the pickle python
-# libary, see the link here: https://docs.python.org/3/library/pickle.html).
+# library, see the link here: https://docs.python.org/3/library/pickle.html).
 # These files will be placed in CommandFiles/ or ParameterFiles/.
 #
 # Usage:
@@ -129,7 +129,7 @@ def getFileList(filename='CHeaderParser-hdr-paths.txt'):
     # create empty list for dumping header data
     master_hdr = []
 
-    # Concatonate all headers into one variable for referencing
+    # Concatenate all headers into one variable for referencing
     for hdr_file in file_list:
         # open header file as single header
         with open(hdr_file) as single_hdr:
@@ -257,7 +257,7 @@ def getFileList(filename='CHeaderParser-hdr-paths.txt'):
                     f"You entered {command_choice}, but that isn't an option.")
             else:
                 ## Choices are presented to user starting at 1, but list
-                ## indicies start at 0
+                ## indices start at 0
                 command_choice -= 1
                 cmdName = unused_cmdDesc[command_choice]
 
@@ -405,7 +405,7 @@ def getFileList(filename='CHeaderParser-hdr-paths.txt'):
                     # Add original data type (C data type) to list
                     dataTypesOrig.append(line_split[0])
 
-                    # Get rid of any occurance of ';' (at the end of the line)
+                    # Get rid of any occurence of ';' (at the end of the line)
                     paramNames.append(re.sub(';', '', line_split[1]))
 
                     # Not sure about why we are keeping track of this yet
diff --git a/Subsystems/cmdGui/CommandFiles/cfe__es__msg_8h b/Subsystems/cmdGui/CommandFiles/cfe__es__msg_8h
index 68ef1c3..b2e5442 100644
--- a/Subsystems/cmdGui/CommandFiles/cfe__es__msg_8h
+++ b/Subsystems/cmdGui/CommandFiles/cfe__es__msg_8h
@@ -1,6 +1,6 @@
 (lp0
 (lp1
-S'Clears the contents of the Exeception and Reset Log'
+S'Clears the contents of the Exception and Reset Log'
 p2
 aS'Clear Executive Services System Log'
 p3
@@ -46,7 +46,7 @@ aS'Stop and Unload Application'
 p23
 aS'Telemeter Memory Pool Statistics'
 p24
-aS'Writes Exeception and Reset Log to a File'
+aS'Writes Exception and Reset Log to a File'
 p25
 aS'Writes contents of Executive Services System Log to a File'
 p26
diff --git a/Subsystems/cmdGui/Parameter.py b/Subsystems/cmdGui/Parameter.py
index c353fe5..1486765 100644
--- a/Subsystems/cmdGui/Parameter.py
+++ b/Subsystems/cmdGui/Parameter.py
@@ -69,7 +69,7 @@ def ProcessSendButton(self):
         if sendSuccess:
             self.status_box.setText('Command sent!')
         else:
-            self.status_box.setText('Error occured')
+            self.status_box.setText('Error occurred')
 
     def closeEvent(self, event):
         if self.mcu:
diff --git a/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_s___c_d_s_reg_dump_rec__t b/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_s___c_d_s_reg_dump_rec__t
index 61400d3..7ec6bcb 100644
--- a/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_s___c_d_s_reg_dump_rec__t
+++ b/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_s___c_d_s_reg_dump_rec__t
@@ -31,7 +31,7 @@ aS'Size, in bytes, of the CDS memory block. boolean Table Flag that indicates wh
 p16
 aS'Processor Unique Name of CDS.'
 p17
-aS'Spare byte to insure structure size is multiple of 4 bytes.'
+aS'Spare byte to ensure structure size is multiple of 4 bytes.'
 p18
 aa(lp19
 S'--word'
diff --git a/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_s___hk_packet__t b/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_s___hk_packet__t
index d379b09..252b09d 100644
--- a/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_s___hk_packet__t
+++ b/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_s___hk_packet__t
@@ -252,7 +252,7 @@ aS'Current state of Performance Analyzer.'
 p110
 aS'Current mode of Performance Analyzer.'
 p111
-aS'Number of Times Perfomance Analyzer has Triggered.'
+aS'Number of Times Performance Analyzer has Triggered.'
 p112
 aS'Current Setting of Performance Analyzer Filter Masks.'
 p113
diff --git a/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_v_s___app_data_cmd__t b/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_v_s___app_data_cmd__t
index 80b0e07..8c5dc72 100644
--- a/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_v_s___app_data_cmd__t
+++ b/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_v_s___app_data_cmd__t
@@ -9,7 +9,7 @@ aa(lp5
 S'[OS_MAX_PATH_LEN]'
 p6
 aa(lp7
-S'Filename where applicaton data is to be written.'
+S'Filename where application data is to be written.'
 p8
 aa(lp9
 S'--string'
diff --git a/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_v_s___log__t b/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_v_s___log__t
index ce41311..37ddf22 100644
--- a/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_v_s___log__t
+++ b/Subsystems/cmdGui/ParameterFiles/struct_c_f_e___e_v_s___log__t
@@ -31,7 +31,7 @@ ag14
 aa(lp15
 S'Index of the next entry in the local event log.'
 p16
-aS'Local Event Kog counter.'
+aS'Local Event Log counter.'
 p17
 aS'Local Event Log full flag.'
 p18
diff --git a/Subsystems/cmdGui/command-pages.txt b/Subsystems/cmdGui/command-pages.txt
index b0479ee..84a98e5 100644
--- a/Subsystems/cmdGui/command-pages.txt
+++ b/Subsystems/cmdGui/command-pages.txt
@@ -3,7 +3,7 @@
 #  This file defines the list of command pages available to the "CommandSystem.py" 
 #  python program.
 # 
-#  The following comma delimted fields must be present:
+#  The following comma delimited fields must be present:
 #  Description, 
 #  Command definition file, 
 #  Command Packet ID, 
diff --git a/Subsystems/cmdUtil/SendUdp.c b/Subsystems/cmdUtil/SendUdp.c
index c64903b..cceb930 100644
--- a/Subsystems/cmdUtil/SendUdp.c
+++ b/Subsystems/cmdUtil/SendUdp.c
@@ -75,7 +75,7 @@ int SendUdp(char *hostname, char *portNum, unsigned char *packetData, int packet
         return -3;
     }
 
-    /* Loop through potential addresses until sucessful socket/connect */
+    /* Loop through potential addresses until successful socket/connect */
     for (rp = result; rp != NULL; rp = rp->ai_next)
     {
         sd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
diff --git a/Subsystems/cmdUtil/cmdUtil.c b/Subsystems/cmdUtil/cmdUtil.c
index ba67814..751919a 100644
--- a/Subsystems/cmdUtil/cmdUtil.c
+++ b/Subsystems/cmdUtil/cmdUtil.c
@@ -214,7 +214,7 @@ void DisplayUsage(char *Name)
     printf("    -T, --pkttype: !OVERRIDE! Packet type (default is cmd, 0=tlm, 1=cmd)\n");
     printf("    -S, --pktsec: !OVERRIDE! Secondary header flag (default set from protocol, 0=absent, 1=present)\n");
     printf("    -A, --pktapid: Application Process Identifier (range=0-0x7FF)\n");
-    printf("    -F, --pktseqflg: !OVERRIDE! Seqence Flags (default unsegmented, 0=continuation, 1=first, 2=last, "
+    printf("    -F, --pktseqflg: !OVERRIDE! Sequence Flags (default unsegmented, 0=continuation, 1=first, 2=last, "
            "3=unsegmented)\n");
     printf("    -G, --pktseqcnt, --pktname: Packet sequence count or Packet name (range=0-0x3FFF)\n");
     printf("    -L, --pktlen: !OVERRIDE! Packet data length (default will calculate value, range=0-0xFFFF)\n");
diff --git a/Subsystems/cmdUtil/readme.txt b/Subsystems/cmdUtil/readme.txt
index 343929d..d1d2161 100644
--- a/Subsystems/cmdUtil/readme.txt
+++ b/Subsystems/cmdUtil/readme.txt
@@ -25,7 +25,7 @@ cmdUtil -- A CCSDS Command Client.
       --port : The UDP port to send the command to ( default = 1234 )
       --pktid : The Packet ID for the command being sent
       --cmdcode : The command code for the command being sent
-      --endian : BE: Dont swap words, LE: Swap words on packet
+      --endian : BE: Don't swap words, LE: Swap words on packet
       --half : Add a 16 bit parameter to the packet ( hex or dec )
       --long : Add a 32 bit parameter to the packet ( hex or dec )
       --string : Add a fixed length string to the packet