diff --git a/docs/source/devguide.html b/docs/source/devguide.html
index 0d4e7e3e2..c93e572bd 100644
--- a/docs/source/devguide.html
+++ b/docs/source/devguide.html
@@ -46,7 +46,7 @@ <h5 id="session.execute"><code>execute(<var>basic_code</var>)</code></h4>
         <h5 id="session.sevaluate"><code>evaluate(<var>basic_expr</var>)</code></h4>
         <p>
             Evaluate a BASIC expression and return its value as a Python value.
-            For type converson rules, see <a href="#session.get_variable"><code>get_variable</code></a>.
+            For type conversion rules, see <a href="#session.get_variable"><code>get_variable</code></a>.
         </p>
 
         <h5 id="session.set_variable"><code>set_variable(<var>name</var>, <var>value</var>)</code></h4>
diff --git a/docs/source/guide.html b/docs/source/guide.html
index 942d6dc59..95abfd61a 100644
--- a/docs/source/guide.html
+++ b/docs/source/guide.html
@@ -15,7 +15,7 @@ <h2 id="guide">Language guide</h2>
     The BASIC Language Guide covers the language topic by topic, thematically grouping
     language elements used for a related purpose. Please refer to the
     <a href="#reference">BASIC Language Reference</a> for a formal description of
-    the langage elements and their syntax.
+    the language elements and their syntax.
 </p>
 
 <section>
@@ -101,7 +101,7 @@ <h3 id="guide-flow">Control flow</h3>
     <p>
         A program is normally executed starting with its lowest line number (or the line number called by <code>RUN</code>). Statements on a line are executed from
         left to right. When all statements on a line are finished, execution moves to the next lowest line number, and so on until no line numbers are left.
-        Control flow statements can be used to modify this normal flow of executon.
+        Control flow statements can be used to modify this normal flow of execution.
     </p>
     <p>
         The <code>END</code> and <code>STOP</code> statements serve
@@ -128,7 +128,7 @@ <h3 id="guide-flow">Control flow</h3>
     <p>
         The <code>ON</code> statement provides an alternative branching construct. An integer value is used to selects
         one of a list of line numbers, and execution is continued from there. It can be used with a <code>GOTO</code> jump
-        as wellas with a <code>GOSUB</code> subroutine call.
+        as well as with a <code>GOSUB</code> subroutine call.
     </p>
     <p>
         <code>ON</code>, <code>GOTO</code> and <code>GOSUB</code> can also be used from direct mode to start a program or subroutine without resetting variables.
diff --git a/docs/source/reference.html b/docs/source/reference.html
index e7f8e42cd..34f32223d 100644
--- a/docs/source/reference.html
+++ b/docs/source/reference.html
@@ -2575,7 +2575,7 @@ <h5>Parameters</h5>
             <li>
                 If <code><var>x</var></code> is negative, <code><var>x</var></code> is converted to a single-precision floating-point value
                 and the random number seed is set to the absolute value of its mantissa.
-                The function then generates a new pseudorandom numer with this seed.
+                The function then generates a new pseudorandom number with this seed.
                 Since the only the mantissa of <code><var>x</var></code> is used, any two values whose ratio is a
                 power of 2 will produce the same seed.
                 Note that this procedure for generating a new seed differs from that used by <code><a href="#RANDOMIZE">RANDOMIZE</a></code>.
@@ -9965,7 +9965,7 @@ <h4 id="SAVE"><code>SAVE</code></h4>
             <li>
                 If <code><b>,A</b></code> is specified, the program will be saved in plain text format.
                 In this case, program execution will stop and control will be returned to the user.
-                Any further statements on teh line will be ignored, also in direct mode.
+                Any further statements on the line will be ignored, also in direct mode.
             </li>
             <li>
                 If <code><b>,P</b></code> is specified, the program will be saved in <a href="#protected-file-format">protected format</a>.
@@ -11444,7 +11444,7 @@ <h4 id="errors">Errors</h4>
                 <td>
                     <samp><b>Device I/O error</b></samp>
                     <p>
-                        An I/O error has occured during input/output to a device. This includes faming errors,
+                        An I/O error has occurred during input/output to a device. This includes framing errors,
                         CRC check failures and unexpected end-of-tape on cassette devices.
                     </p>
                 </td>
@@ -11619,7 +11619,7 @@ <h4 id="errors">Errors</h4>
     <p>
         If a <samp>Syntax error</samp> occurs during program execution,
         the error message is followed by a listing of the program line
-        in which the error occurred, wth the cursor positioned at the location
+        in which the error occurred, with the cursor positioned at the location
         where the error was raised.
     </p>
     <p>
diff --git a/docs/source/techref.html b/docs/source/techref.html
index 83bbab5bd..70acf6766 100644
--- a/docs/source/techref.html
+++ b/docs/source/techref.html
@@ -515,7 +515,7 @@ <h3 id="protected-file-format">Protected file format</h3>
             </dt>
             <dd>
                 Encrypted content of a tokenised program file, including its
-                end of file marker but excluding its magic byte. The encription cipher
+                end of file marker but excluding its magic byte. The encryption cipher
                 rotates through an 11-byte and a 13-byte key so that the resulting
                 transformation is the same after 143 bytes. For each byte,
                 <ul>