diff --git a/README.md b/README.md
index 17666249..f8e094d3 100644
--- a/README.md
+++ b/README.md
@@ -115,7 +115,7 @@ make
 
 This directory contains examples for securing a Bluetooth Low Energy Link (BTLE).
 BTLE packets are small and throughput is low, so these examples demonstrate a way
-to exchange data securley without BTLE pariing.
+to exchange data securely without BTLE pairing.
 
 
 ## Notes
diff --git a/SGX_Linux/trusted/Wolfssl_Enclave.c b/SGX_Linux/trusted/Wolfssl_Enclave.c
index 0c529579..b162582f 100644
--- a/SGX_Linux/trusted/Wolfssl_Enclave.c
+++ b/SGX_Linux/trusted/Wolfssl_Enclave.c
@@ -1,3 +1,24 @@
+/* Wolfssl_Enclave.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
 #include <stdarg.h>
 #include <stdio.h>      /* vsnprintf */
 
@@ -7,7 +28,7 @@
 
 
 #if defined(XMALLOC_USER) || defined(XMALLOC_OVERRIDE)
-    #warning verfication of heap hint pointers needed when overriding default malloc/free
+    #warning verification of heap hint pointers needed when overriding default malloc/free
 #endif
 
 
@@ -158,7 +179,7 @@ long enc_wolfTLSv1_2_server_method(void)
 }
 
 
-/* returns method releated to id */
+/* returns method related to id */
 static WOLFSSL_METHOD* GetMethod(long id)
 {
     switch (id) {
diff --git a/SGX_Linux/trusted/Wolfssl_Enclave.h b/SGX_Linux/trusted/Wolfssl_Enclave.h
index 3693c470..9f7d7f30 100644
--- a/SGX_Linux/trusted/Wolfssl_Enclave.h
+++ b/SGX_Linux/trusted/Wolfssl_Enclave.h
@@ -1,3 +1,24 @@
+/* Wolfssl_Enclave.h
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
 #ifndef _BENCHMARK_ENCLAVE_H_
 #define _BENCHMARK_ENCLAVE_H_
 
diff --git a/SGX_Linux/untrusted/client-tls.c b/SGX_Linux/untrusted/client-tls.c
index cb715640..2ca5dc29 100644
--- a/SGX_Linux/untrusted/client-tls.c
+++ b/SGX_Linux/untrusted/client-tls.c
@@ -18,6 +18,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  */
+
 #include "client-tls.h"
 
 #include    <stdio.h>
@@ -44,7 +45,7 @@ int client_connect(sgx_enclave_id_t id)
     long ssl;
 
 
-    /* data to send to the server, data recieved from the server */
+    /* data to send to the server, data received from the server */
     char    sendBuff[] = "Hello WolfSSL!";
     char rcvBuff[MAXDATASIZE] = {0};
 
@@ -155,7 +156,7 @@ int client_connect(sgx_enclave_id_t id)
         printf("Read error. Error: %i\n", ret);
         return EXIT_FAILURE;
     }
-    printf("Recieved: \t%s\n", rcvBuff);
+    printf("Received: \t%s\n", rcvBuff);
 
     /* frees all data before client termination */
     enc_wolfSSL_free(id, ssl);
diff --git a/SGX_Linux/untrusted/server-tls.c b/SGX_Linux/untrusted/server-tls.c
index 6e8715d7..4a1e9c82 100644
--- a/SGX_Linux/untrusted/server-tls.c
+++ b/SGX_Linux/untrusted/server-tls.c
@@ -112,7 +112,7 @@ int server_connect(sgx_enclave_id_t id)
 
     /* Initialize the server address struct with zeros */
     memset(&servAddr, 0, sizeof(servAddr));
-/* Fill in the server address */
+    /* Fill in the server address */
     servAddr.sin_family      = AF_INET;             /* using IPv4      */
     servAddr.sin_port        = htons(DEFAULT_PORT); /* on DEFAULT_PORT */
     servAddr.sin_addr.s_addr = INADDR_ANY;          /* from anywhere   */
diff --git a/btle/ecc-server.c b/btle/ecc-server.c
index b0325cf4..9e1f00f3 100644
--- a/btle/ecc-server.c
+++ b/btle/ecc-server.c
@@ -106,7 +106,7 @@ int main(int argc, char** argv)
         printf("wc_ecc_export_x963 failed %d\n", ret);
         goto cleanup;
     }
-    /* TODO: Server should hash and sign this public key with a trust ceritifcate (already exchanged) */
+    /* TODO: Server should hash and sign this public key with a trust certificate (already exchanged) */
     /* ECC signature is about 65 bytes */
 
 
diff --git a/certfields/extract-pubkey-from-certfile/README.md b/certfields/extract-pubkey-from-certfile/README.md
index 6f1d8bf0..a9b1f5a5 100644
--- a/certfields/extract-pubkey-from-certfile/README.md
+++ b/certfields/extract-pubkey-from-certfile/README.md
@@ -5,7 +5,7 @@ public key and subject name information.
 
 ## Compiling and Running the Example
 
-To compile, first build wolfSSL with the OpenSSL compatibilty layer enabled:
+To compile, first build wolfSSL with the OpenSSL compatibility layer enabled:
 
 ```
 $ cd wolfssl-X.X.X
diff --git a/certfields/extract-pubkey-from-certfile/main.c b/certfields/extract-pubkey-from-certfile/main.c
index 1dcf3642..9ca2c74a 100644
--- a/certfields/extract-pubkey-from-certfile/main.c
+++ b/certfields/extract-pubkey-from-certfile/main.c
@@ -67,7 +67,7 @@ int main(void)
         printf("Failed to decode public key from pubKeyTmp, abort!\n");
         return ret;
     }
-    printf("Succesfully decoded public key\n");
+    printf("Successfully decoded public key\n");
 
     printf("PUBLIC KEY:\n");
     for (i = 0; i < pubKeyTmp->pkey_sz; i++) {
diff --git a/certgen/certgen_example.c b/certgen/certgen_example.c
index 8a80da0a..18431ec9 100644
--- a/certgen/certgen_example.c
+++ b/certgen/certgen_example.c
@@ -1,3 +1,24 @@
+/* certgen_example.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
 #include <stdio.h>
 #include <wolfssl/options.h>
 #include <wolfssl/wolfcrypt/settings.h>
diff --git a/certgen/certgen_with_altnames.c b/certgen/certgen_with_altnames.c
index 0e184c75..9e9a0450 100644
--- a/certgen/certgen_with_altnames.c
+++ b/certgen/certgen_with_altnames.c
@@ -1,3 +1,24 @@
+/* certgen_with_altnames.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
 #include <stdio.h>
 #include <wolfssl/options.h>
 #include <wolfssl/wolfcrypt/settings.h>
@@ -144,7 +165,7 @@ int main(void) {
 
     /* Add some alt names to our cert: */
     char myAltNames[] = {
-         /* SEQUENCE (1 element with 3 segements. Entire length is 41
+         /* SEQUENCE (1 element with 3 segments. Entire length is 41
           * (0x29 in hex))
           */
          0x30, 0x29,
diff --git a/certgen/csr_w_ed25519_example.c b/certgen/csr_w_ed25519_example.c
index c4f3e65f..8cea985f 100644
--- a/certgen/csr_w_ed25519_example.c
+++ b/certgen/csr_w_ed25519_example.c
@@ -1,3 +1,24 @@
+/* csr_w_ed25519_example.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
 #include <wolfssl/options.h>
 #include <wolfssl/wolfcrypt/settings.h>
 #include <wolfssl/wolfcrypt/ed25519.h>
diff --git a/crypto/camellia/camellia-encrypt.c b/crypto/camellia/camellia-encrypt.c
index 374c25cd..e80a7099 100644
--- a/crypto/camellia/camellia-encrypt.c
+++ b/crypto/camellia/camellia-encrypt.c
@@ -31,7 +31,7 @@
 #define SALT_SIZE 8
 
 /*
- * Makes a cryptographically secure key by stretMDMching a user entered key
+ * Makes a cryptographically secure key by stretching a user entered key
  */
 int GenerateKey(RNG* rng, byte* key, int size, byte* salt, int pad)
 {
diff --git a/custom-io-callbacks/README.md b/custom-io-callbacks/README.md
index 60eaf2b9..c3aa8c0e 100644
--- a/custom-io-callbacks/README.md
+++ b/custom-io-callbacks/README.md
@@ -1,52 +1,54 @@
-This is an example to demonstrate how the custom IO callbacks can be used to</br>
-facilitate a TLS connection using any medium. Here we chose the medium: "File System".</br>
+# Custom IO Callback Example
 
-Other mediums might be: </br>
-USB Serial connection </br>
-Bluetooth </br>
-RFID </br>
-Wifi </br>
-Ethernet </br>
-</br>
-Just to name a few.</br>
-</br>
-These examples use the wolfSSL Custom IO Callbacks to read and write to the file</br>
-system and perform a successful handshake.</br>
-</br>
-The configuration used for these examples was:</br>
-./configure --enable-debug</br>
-</br>
-Debug was enabled in case a user wishes to use the verbose flag to see what is</br>
-happening in real time:</br>
-</br>
-Usage examples:</br>
-</br>
-From the file-server directory:</br>
-./start-server</br>
-./start-server -v</br>
-./start-server -verbose</br>
-</br>
-From the file-client directory:</br>
-./start-client</br>
-./start-client -v</br>
-./start-client -verbose</br>
-</br>
-(-v and -verbose accomplish the same thing)</br>
-</br>
-</br>
-SCRIPTS: The scripts provided attempt to make testing easier.</br>
-</br>
-file-server/check.sh</br>
-    - starts the server in a background shell and runs the client </br>
-    </br>
-USAGE:</br>
-    ./check.sh</br>
-    ./check.sh -v</br>
-    ./check.sh -verbose</br>
-</br>
-file-client/clean-io-files.sh</br>
-    - If something happens and there is leftover junk in the io files run this</br>
-      script to quickly cleanup before next round of testing.</br>
-USAGE:</br>
-    ./clean-io-files.sh</br>
-    </br>
+This is an example to demonstrate how the custom IO callbacks can be used to
+facilitate a TLS connection using any medium. Here we chose the medium: "File System".
+
+Other transports might be:
+* USB Serial connection
+* Bluetooth
+* RFID
+* Wifi
+* Ethernet
+
+These examples use the wolfSSL Custom IO Callbacks to read and write to the file
+system and perform a successful handshake.
+
+The configuration used for these examples:
+
+`./configure --enable-debug`
+
+Debug was enabled in case a user wishes to use the verbose flag to see what is
+happening in real time:
+
+Usage examples:
+
+From the file-server directory:
+./start-server
+./start-server -v
+./start-server -verbose
+
+From the file-client directory:
+./start-client
+./start-client -v
+./start-client -verbose
+
+(-v and -verbose accomplish the same thing)
+
+## SCRIPTS
+
+The scripts provided attempt to make testing easier.
+
+* file-server/check.sh
+    - starts the server in a background shell and runs the client
+
+USAGE:
+    ./check.sh
+    ./check.sh -v
+    ./check.sh -verbose
+
+* file-client/clean-io-files.sh
+    - If something happens and there is leftover junk in the io files run this
+      script to quickly cleanup before next round of testing.
+
+USAGE:
+    ./clean-io-files.sh
diff --git a/custom-io-callbacks/file-client/file-client.c b/custom-io-callbacks/file-client/file-client.c
index d67630de..a61b5a7c 100644
--- a/custom-io-callbacks/file-client/file-client.c
+++ b/custom-io-callbacks/file-client/file-client.c
@@ -18,7 +18,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
  *
- * EXAMPLE DEFINIITON:
+ * EXAMPLE DEFINITION:
  *
  * Instead of using sockets we will show how it is possible
  * to deliver TLS handshake and packet exchange through the use of
diff --git a/custom-io-callbacks/file-server/file-server.c b/custom-io-callbacks/file-server/file-server.c
index 1b74dbf0..aad2f3bf 100644
--- a/custom-io-callbacks/file-server/file-server.c
+++ b/custom-io-callbacks/file-server/file-server.c
@@ -18,7 +18,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
  *
- * EXAMPLE DEFINIITON:
+ * EXAMPLE DEFINITION:
  *
  * Instead of using sockets we will show how it is possible
  * to deliver TLS handshake and packet exchange through the use of
@@ -241,7 +241,7 @@ int main(int argc, char** argv)
             printf("Server send successful\n");
             break;
         } else {
-            printf("Unkown error occured, shutting down\n");
+            printf("Unkown error occurred, shutting down\n");
             break;
         }
     }
diff --git a/dtls/client-dtls-ipv6.c b/dtls/client-dtls-ipv6.c
index 523fb43c..f5f3e5a2 100644
--- a/dtls/client-dtls-ipv6.c
+++ b/dtls/client-dtls-ipv6.c
@@ -1,5 +1,5 @@
 /*
- * client-dtls.c
+ * client-dtls-ipv6.c
  *
  * Copyright (C) 2006-2020 wolfSSL Inc.
  *
diff --git a/dtls/client-dtls-nonblocking.c b/dtls/client-dtls-nonblocking.c
index b7d4cd46..a7b61a64 100644
--- a/dtls/client-dtls-nonblocking.c
+++ b/dtls/client-dtls-nonblocking.c
@@ -178,7 +178,7 @@ int main (int argc, char** argv)
     }
 
     if (ret != SSL_SUCCESS) {
-        printf("SSL_connectrfailed with");
+        printf("SSL_connect failed with");
     }
 /*                                                                           */
 /*****************************************************************************/
diff --git a/dtls/server-dtls-ipv6.c b/dtls/server-dtls-ipv6.c
index 997cd209..aa3f4aed 100644
--- a/dtls/server-dtls-ipv6.c
+++ b/dtls/server-dtls-ipv6.c
@@ -1,4 +1,4 @@
-/* server-dtls.c
+/* server-dtls-ipv6.c
  *
  * Copyright (C) 2006-2015 wolfSSL Inc.
  *
diff --git a/dtls/server-udp.c b/dtls/server-udp.c
index 9a509a96..c452e425 100644
--- a/dtls/server-udp.c
+++ b/dtls/server-udp.c
@@ -38,7 +38,7 @@
 int main (void)
 {
     int           sockfd;                   /* Initialize our socket */
-    int           recvLen;                  /* number of bytes recieved */
+    int           recvLen;                  /* number of bytes received */
     int           msgNum = 0;               /* number of msg received */
     unsigned char buf[MSGLEN];              /* the incoming message */
     struct        sockaddr_in servAddr;     /* our server's address */
diff --git a/ecc/ecc-key-decode.c b/ecc/ecc-key-decode.c
index dcf8572f..59663c07 100644
--- a/ecc/ecc-key-decode.c
+++ b/ecc/ecc-key-decode.c
@@ -104,7 +104,7 @@ static void check_ret(char* call, int ret)
 
 int main(void)
 {
-    printf("Not compiled in: Must build wolfSSL using ./confgiure --enable-opensslextra or ./configure CFLAGS=-DWOLFSSL_TEST_CERT\n");
+    printf("Not compiled in: Must build wolfSSL using ./configure --enable-opensslextra or ./configure CFLAGS=-DWOLFSSL_TEST_CERT\n");
     return 0;
 }
 
diff --git a/ecc/ecc-key-export.c b/ecc/ecc-key-export.c
index 259eddb8..989b69e6 100644
--- a/ecc/ecc-key-export.c
+++ b/ecc/ecc-key-export.c
@@ -100,7 +100,7 @@ int main(void)
 
     fp = fopen("./" XSTRINGIFY(TEST_ECC_KEY_CURVE) ".der", "wb");
     if (!fp) {
-        printf("Error openening %s for write\n",
+        printf("Error opening %s for write\n",
             "./" XSTRINGIFY(TEST_ECC_KEY_CURVE) ".der");
         return -1;
     }
@@ -121,7 +121,7 @@ int main(void)
 
     fp = fopen("./" XSTRINGIFY(TEST_ECC_KEY_CURVE) ".pem", "wb");
     if (!fp) {
-        printf("Error openening %s for write\n",
+        printf("Error opening %s for write\n",
             "./" XSTRINGIFY(TEST_ECC_KEY_CURVE) ".pem");
         return -1;
     }
@@ -142,7 +142,7 @@ int main(void)
 
     fp = fopen("./" XSTRINGIFY(TEST_ECC_KEY_CURVE) "_pub.der", "wb");
     if (!fp) {
-        printf("Error openening %s for write\n",
+        printf("Error opening %s for write\n",
             "./" XSTRINGIFY(TEST_ECC_KEY_CURVE) "_pub.der");
         return -1;
     }
@@ -167,7 +167,7 @@ int main(void)
 
     fp = fopen("./" XSTRINGIFY(TEST_ECC_KEY_CURVE) "_pub.pem", "wb");
     if (!fp) {
-        printf("Error openening %s for write\n",
+        printf("Error opening %s for write\n",
             "./" XSTRINGIFY(TEST_ECC_KEY_CURVE) "_pub.pem");
         return -1;
     }
diff --git a/pk/ecdh_generate_secret/ecdh_gen_secret.c b/pk/ecdh_generate_secret/ecdh_gen_secret.c
index 9db21775..00786792 100644
--- a/pk/ecdh_generate_secret/ecdh_gen_secret.c
+++ b/pk/ecdh_generate_secret/ecdh_gen_secret.c
@@ -1,3 +1,24 @@
+/* ecdh_gen_secret.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL. (formerly known as CyaSSL)
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
 #include <stdio.h>
 
 #include <wolfssl/options.h>
diff --git a/pk/ed25519_gen/gen_key_files.c b/pk/ed25519_gen/gen_key_files.c
index f904aae8..72a1f910 100644
--- a/pk/ed25519_gen/gen_key_files.c
+++ b/pk/ed25519_gen/gen_key_files.c
@@ -1,3 +1,24 @@
+/* gen_key_files.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL. (formerly known as CyaSSL)
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
 #include <stdio.h>
 #include <wolfssl/options.h>
 #include <wolfssl/wolfcrypt/ed25519.h>
diff --git a/pk/ed25519_gen/sign_and_verify.c b/pk/ed25519_gen/sign_and_verify.c
index d9f17964..447ed1db 100644
--- a/pk/ed25519_gen/sign_and_verify.c
+++ b/pk/ed25519_gen/sign_and_verify.c
@@ -1,3 +1,24 @@
+/* sign_and_verify.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL. (formerly known as CyaSSL)
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
 #include <stdio.h>
 
 #include <wolfssl/options.h>
diff --git a/pk/rsa/rsa-nb.c b/pk/rsa/rsa-nb.c
index 095e2c90..beb90d20 100644
--- a/pk/rsa/rsa-nb.c
+++ b/pk/rsa/rsa-nb.c
@@ -1,4 +1,4 @@
-/* rsa-pss.c
+/* rsa-nb.c
  *
  * Copyright (C) 2006-2020 wolfSSL Inc.
  *
diff --git a/pk/srp/srp.c b/pk/srp/srp.c
index 16c589f1..210399f1 100644
--- a/pk/srp/srp.c
+++ b/pk/srp/srp.c
@@ -51,7 +51,7 @@ static int client_init(Srp** srp)
     return ret;
 }
 
-/* Calcuate the client's public key */
+/* Calculate the client's public key */
 static int client_calc_public(Srp* srp, const char* username, char* password,
                               byte* salt, word32 saltSz, byte* pubKey,
                               word32* pubKeySz)
@@ -115,7 +115,7 @@ static int server_init(Srp** srp)
     return ret;
 }
 
-/* Calcuate the server's public key */
+/* Calculate the server's public key */
 static int server_calc_public(Srp* srp, const char* username, byte* salt,
                               word32 saltSz, byte* verifier, word32 vSz,
                               byte* pubKey, word32* pubKeySz)
diff --git a/psk/README.md b/psk/README.md
index 997c9c2b..0ed7e2e9 100644
--- a/psk/README.md
+++ b/psk/README.md
@@ -265,7 +265,7 @@ Session resumption allows a client/server pair to re-use previously generated cr
 3. Change all calls from write() or send() to wolfSSL_write(), in the simple server
     ``write(sockfd, sendline, strlen(sendline))`` becomes ``wolfSSL_write(ssl, sendline, strlen(sendline))``
 
-4. Run the wolfSSL method to initalize wolfSSL
+4. Run the wolfSSL method to initialize wolfSSL
     ``wolfSSL_Init()``
 
 5. Create a ctx pointer that contains a server method using the following process. The server method wolfSSLv23_server_method()
diff --git a/psk/client-psk-bio-custom.c b/psk/client-psk-bio-custom.c
index d6216c06..549959fc 100644
--- a/psk/client-psk-bio-custom.c
+++ b/psk/client-psk-bio-custom.c
@@ -225,7 +225,7 @@ int main(int argc, char **argv)
     /* set up pre shared keys */
     wolfSSL_CTX_set_psk_client_callback(ctx, My_Psk_Client_Cb);
 
-    /* creat wolfssl object after each tcp connct */
+    /* creat wolfssl object after each tcp connect */
     if ( (ssl = wolfSSL_new(ctx)) == NULL) {
         fprintf(stderr, "wolfSSL_new error.\n");
         goto exit;
diff --git a/psk/client-psk.c b/psk/client-psk.c
index d0bfa70d..bcd858f5 100644
--- a/psk/client-psk.c
+++ b/psk/client-psk.c
@@ -111,7 +111,7 @@ int main(int argc, char **argv)
     /* set up pre shared keys */
     wolfSSL_CTX_set_psk_client_callback(ctx, My_Psk_Client_Cb);
 
-    /* creat wolfssl object after each tcp connct */
+    /* creat wolfssl object after each tcp connect */
     if ( (ssl = wolfSSL_new(ctx)) == NULL) {
         fprintf(stderr, "wolfSSL_new error.\n");
         return 1;
diff --git a/psk/client-tcp.c b/psk/client-tcp.c
index 3d4f2c52..d8f01ad7 100644
--- a/psk/client-tcp.c
+++ b/psk/client-tcp.c
@@ -35,7 +35,7 @@
 
 /*
  * this function will send the inputted string to the server and then
- * recieve the string from the server outputing it to the termial
+ * receive the string from the server outputing it to the terminal
  */
 
 int main(int argc, char **argv)
diff --git a/signature/README.md b/signature/README.md
index 92900309..2b24229c 100644
--- a/signature/README.md
+++ b/signature/README.md
@@ -31,7 +31,7 @@ ED25519 directory contains:
 formatted files.
 
 2. genkeybuffers.pl - a perl script to write the header file "test_keys.h" using
-   the .der formatted files output from applicaton "gen_key_files.c"
+   the .der formatted files output from application "gen_key_files.c"
 
 3. App "sign_and_verify.c" to use the "test_keys.h" header file buffers for
    importing the public and private keys. App will then sign a msg with the
diff --git a/tls/README.md b/tls/README.md
index 90c84993..68ba9908 100644
--- a/tls/README.md
+++ b/tls/README.md
@@ -9,7 +9,7 @@ connection, but modified to utilize wolfSSL to establish a TLS 1.2 connection.
 In general, the naming convention of these files mean that if a file is named
 in the form `X-Y.c`, then it's a copy of `X.c` intended to demonstrate Y. The
 exceptions being `server-tls.c` and `client-tls.c`, as noted above.
-Furthermore, the files is formated such that using a diff tool such as
+Furthermore, the files is formatted such that using a diff tool such as
 `vimdiff` to compare `X-Y.c` to `X.c` should highlight only the relevant
 changes required to convert `X.c` into `X-Y.c`
 
@@ -261,7 +261,7 @@ socket [...]" block, add these lines:
     servAddr.sin_addr.s_addr = INADDR_ANY;          /* from anywhere   */
 ```
 
-That "Initialize the sever address sturuct wit zeros" step is not strictly
+That "Initialize the server address struct wit zeros" step is not strictly
 necessary, but it's usually a good idea, and it doesn't complicate the example
 too much.
 
@@ -500,7 +500,7 @@ Now we can fill out the address of the server we want to connect to. After the
     }
 ```
 
-Once more, this is quite similar to server code. This time, hovewer, rather
+Once more, this is quite similar to server code. This time, however, rather
 than setting `servAddr.sin_addr.s_addr` to `INADDR_ANY`, we're going to make a
 call to `inet_pton()` to read `argv[1]` as an IPv4 address and assign it to the
 right place in `servAddr`. If `argv[1]` is well formed, `inet_pton()` will
@@ -1053,7 +1053,7 @@ with zeros" block is a good place. After this, add these lines:
 
 And just like that wolfSSL will use our functions to send and receive data. Now
 when this program is run we should see a number of "my\_OISend: sent" and
-"my\_IORecv: recieved" lines in our output.
+"my\_IORecv: received" lines in our output.
 
 #### <a name="run-callback">Running</a>
 
diff --git a/tls/client-tls-cacb.c b/tls/client-tls-cacb.c
index d0c407d0..a0d1a1bd 100644
--- a/tls/client-tls-cacb.c
+++ b/tls/client-tls-cacb.c
@@ -38,7 +38,7 @@ const char* cert = "../certs/ca-cert.pem";
  */
 int ClientGreet(int sock, WOLFSSL* ssl)
 {
-    /* data to send to the server, data recieved from the server */
+    /* data to send to the server, data received from the server */
     char    sendBuff[MAXDATASIZE], rcvBuff[MAXDATASIZE] = {0};
     int     ret = 0;                /* variable for error checking */
 
@@ -61,7 +61,7 @@ int ClientGreet(int sock, WOLFSSL* ssl)
         printf("Read error. Error: %i\n", ret);
         return EXIT_FAILURE;
     }
-    printf("Recieved: \t%s\n", rcvBuff);
+    printf("Received: \t%s\n", rcvBuff);
 
     return ret;
 }
@@ -85,9 +85,9 @@ static void CaCb(unsigned char* der, int sz, int type)
         int   ret;
         int   sz = sizeof(serial);
 
-        WOLFSSL_X509_NAME* issureName = wolfSSL_X509_get_issuer_name(x509);
+        WOLFSSL_X509_NAME* issuerName = wolfSSL_X509_get_issuer_name(x509);
         WOLFSSL_X509_NAME* subjectName = wolfSSL_X509_get_subject_name(x509);
-        issuer  = wolfSSL_X509_NAME_oneline(issureName, 0, 0);
+        issuer  = wolfSSL_X509_NAME_oneline(issuerName, 0, 0);
         subject = wolfSSL_X509_NAME_oneline(subjectName, 0, 0);
 
         printf("\tIssuer : %s\n\tSubject: %s\n", issuer, subject);
@@ -131,7 +131,7 @@ int Security(int sock)
 
     wolfSSL_Init();      /* initialize wolfSSL */
 
-    /* create and initiLize WOLFSSL_CTX structure */
+    /* create and initialize WOLFSSL_CTX structure */
     if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method())) == NULL) {
         printf("SSL_CTX_new error.\n");
         return EXIT_FAILURE;
diff --git a/tls/client-tls-perf.c b/tls/client-tls-perf.c
index cb33bee8..d2dec29d 100644
--- a/tls/client-tls-perf.c
+++ b/tls/client-tls-perf.c
@@ -114,7 +114,7 @@ typedef struct SSLConnCtx {
     /* Total time handling resumed connections. */
     double resumeTime;
 #ifdef WOLFSSL_ASYNC_CRYPT
-    /* Total time handling aynchronous operations. */
+    /* Total time handling asynchronous operations. */
     double asyncTime;
 #endif
     /* Total time handling reading. */
@@ -738,7 +738,7 @@ static void WolfSSLCtx_Final(WOLFSSL_CTX* ctx)
 #endif
 }
 
-/* Create a socket to talf to server on and connect.
+/* Create a socket to talk to server on and connect.
  *
  * port      The port the server is listening on.
  * socketfd  The connected socket.
diff --git a/tls/server-tls-epoll-perf.c b/tls/server-tls-epoll-perf.c
index da633126..6f98bbc0 100644
--- a/tls/server-tls-epoll-perf.c
+++ b/tls/server-tls-epoll-perf.c
@@ -117,7 +117,7 @@ typedef struct SSLConn_CTX {
     /* Total time handling accept - resumed connections. */
     double resumeTime;
 #ifdef WOLFSSL_ASYNC_CRYPT
-    /* Total time handling aynchronous operations. */
+    /* Total time handling asynchronous operations. */
     double asyncTime;
 #endif
     /* Total time handling reading. */
diff --git a/tls/server-tls-epoll-threaded.c b/tls/server-tls-epoll-threaded.c
index d8f8053f..714471fc 100644
--- a/tls/server-tls-epoll-threaded.c
+++ b/tls/server-tls-epoll-threaded.c
@@ -134,7 +134,7 @@ typedef struct SSLConn_CTX {
     /* Total time handling accepts - resumed connections. */
     double resumeTime;
 #ifdef WOLFSSL_ASYNC_CRYPT
-    /* Total time handling aynchronous operations. */
+    /* Total time handling asynchronous operations. */
     double asyncTime;
 #endif
     /* Total time handling reading. */
@@ -1228,7 +1228,7 @@ int main(int argc, char* argv[])
     for (i = 0; i < numThreads; i++) {
         if (pthread_create(&sslConnCtx->threadData[i].thread_id, NULL,
                            ThreadHandler, &sslConnCtx->threadData[i]) < 0) {
-            perror("ERRROR: could not create thread");
+            perror("ERROR: could not create thread");
         }
     }
 
@@ -1249,4 +1249,3 @@ int main(int argc, char* argv[])
 
     exit(EXIT_SUCCESS);
 }
-