diff --git a/Doc/ref/ref1.tex b/Doc/ref/ref1.tex
index c35f157..37fbad7 100644
--- a/Doc/ref/ref1.tex
+++ b/Doc/ref/ref1.tex
@@ -13,7 +13,7 @@
 On the other hand, if you are using
 Python and wonder what the precise rules about a particular area of
 the language are, you should definitely be able to find them here.
-If you would like to see a more formal definitition of the language,
+If you would like to see a more formal definition of the language,
 maybe you could volunteer your time --- or invent a cloning machine
 :-).
 
diff --git a/Doc/ref/ref3.tex b/Doc/ref/ref3.tex
index 4895c9b..cdf5e62 100644
--- a/Doc/ref/ref3.tex
+++ b/Doc/ref/ref3.tex
@@ -217,7 +217,7 @@
 These represent finite ordered sets indexed by natural numbers.
 The built-in function \function{len()}\bifuncindex{len} returns the
 number of items of a sequence.
-When the lenth of a sequence is \var{n}, the
+When the length of a sequence is \var{n}, the
 index set contains the numbers 0, 1, \ldots, \var{n}-1.  Item
 \var{i} of sequence \var{a} is selected by \code{\var{a}[\var{i}]}.
 \obindex{sequence}
@@ -310,7 +310,7 @@
 Mutable sequences can be changed after they are created.  The
 subscription and slicing notations can be used as the target of
 assignment and \keyword{del} (delete) statements.
-\obindex{mutable sequece}
+\obindex{mutable sequence}
 \obindex{mutable}
 \indexii{assignment}{statement}
 \index{delete}
@@ -700,7 +700,7 @@
 the bytecode; \member{co_filename} is the filename from which the code
 was compiled; \member{co_firstlineno} is the first line number of the
 function; \member{co_lnotab} is a string encoding the mapping from
-byte code offsets to line numbers (for detais see the source code of
+byte code offsets to line numbers (for details see the source code of
 the interpreter); \member{co_stacksize} is the required stack size
 (including local variables); \member{co_flags} is an integer encoding
 a number of flags for the interpreter.
@@ -815,8 +815,8 @@
 k:l]}, or \code{a[..., i:j])}.  They are also created by the built-in
 \function{slice()}\bifuncindex{slice} function.
 
-Special read-only attributes: \member{start} is the lowerbound;
-\member{stop} is the upperbound; \member{step} is the step value; each is
+Special read-only attributes: \member{start} is the lower bound;
+\member{stop} is the upper bound; \member{step} is the step value; each is
 \code{None} if omitted. These attributes can have any type.
 \withsubitem{(slice object attribute)}{
   \ttindex{start}
diff --git a/Doc/ref/ref6.tex b/Doc/ref/ref6.tex
index e2552be..dc50c27 100644
--- a/Doc/ref/ref6.tex
+++ b/Doc/ref/ref6.tex
@@ -431,7 +431,7 @@
 \keyword{while} loop, but not nested in a function or class definition or
 \keyword{try} statement within that loop.\footnote{It may
 occur within an \keyword{except} or \keyword{else} clause.  The
-restriction on occurring in the \keyword{try} clause is implementer's
+restriction on occurring in the \keyword{try} clause is implementor's
 laziness and will eventually be lifted.}
 It continues with the next cycle of the nearest enclosing loop.
 \stindex{for}
diff --git a/Doc/ref/ref7.tex b/Doc/ref/ref7.tex
index 097bbcd..6356cd8 100644
--- a/Doc/ref/ref7.tex
+++ b/Doc/ref/ref7.tex
@@ -211,7 +211,7 @@
 handler continues in the surrounding code and on the invocation stack.
 
 If the evaluation of an expression in the header of an except clause
-raises an exception, the original search for a handler is cancelled
+raises an exception, the original search for a handler is canceled
 and a search starts for the new exception in the surrounding code and
 on the call stack (it is treated as if the entire \keyword{try} statement
 raised the exception).