diff --git a/collects/2htdp/private/image-more.rkt b/collects/2htdp/private/image-more.rkt
index 74c65d9c6c..541615617f 100644
--- a/collects/2htdp/private/image-more.rkt
+++ b/collects/2htdp/private/image-more.rkt
@@ -1003,7 +1003,7 @@
 
 ; excess : R+ R+ -> R
 ;  compute the Euclidean excess
-;  Note: If the excess is 0, the the C is 90 deg.
+;  Note: If the excess is 0, then C is 90 deg.
 ;        If the excess is negative, then C is obtuse.
 ;        If the excess is positive, then C is acuse.
 (define (excess a b c)
diff --git a/collects/meta/build/build b/collects/meta/build/build
index 6337969dd7..d642f1457c 100755
--- a/collects/meta/build/build
+++ b/collects/meta/build/build
@@ -149,7 +149,7 @@ webscript="collects/meta/web/build.rkt"
 # sitemap materials
 sitemapdir="$scriptdir/sitemap"
 
-# platform-installer stuff, all relative the the racket tree
+# platform-installer stuff, all relative to the racket tree
 nsisdir="$scriptdir/nsis"
 unixinstallerdir="$scriptdir/unix-installer"
 unixpathcheckscript="$unixinstallerdir/check-install-paths"
diff --git a/collects/meta/web/stubs/git.rkt b/collects/meta/web/stubs/git.rkt
index f543d2256f..f52770d09c 100644
--- a/collects/meta/web/stubs/git.rkt
+++ b/collects/meta/web/stubs/git.rkt
@@ -2601,7 +2601,7 @@
        accept it.  On the other hand, if you're working with someone specific,
        they might prefer attachments (for example, it's easier to save the
        attached file from gmail).}}
-@~ Once the commits have been pushed the the main repository, you would get
+@~ Once the commits have been pushed to the main repository, you would get
    them when you pull to update.  The commits will now be different objects
    than the ones you have — since the information changed (at least the
    committer information will be different, the log message might have been
diff --git a/collects/mzlib/private/contract-arr-checks.rkt b/collects/mzlib/private/contract-arr-checks.rkt
index 9bbb341fc1..19c887aeec 100644
--- a/collects/mzlib/private/contract-arr-checks.rkt
+++ b/collects/mzlib/private/contract-arr-checks.rkt
@@ -161,7 +161,7 @@
     (raise-blame-error
      blame
      val
-     "expected a procedure that accepts ~a arguments and and arbitrarily more~a, given: ~e"
+     "expected a procedure that accepts ~a arguments and arbitrarily more~a, given: ~e"
      dom-length
      (keyword-error-text mandatory-kwds)
      val)))
diff --git a/collects/parser-tools/parser-tools.scrbl b/collects/parser-tools/parser-tools.scrbl
index 2954ae2e75..90debe4624 100644
--- a/collects/parser-tools/parser-tools.scrbl
+++ b/collects/parser-tools/parser-tools.scrbl
@@ -140,7 +140,7 @@ are a few examples, using @scheme[:] prefixed SRE syntax:
 
 @item{@schemeblock0[(:: "/*" (:* (complement "*/")) "*/")]
 
- Matches any string that starts with @scheme["/*"] and and ends with
+ Matches any string that starts with @scheme["/*"] and ends with
  @scheme["*/"], including @scheme["/* */ */ */"].
  @scheme[(complement "*/")] matches any string except @scheme["*/"].
  This includes @scheme["*"] and @scheme["/"] separately.  Thus
diff --git a/collects/redex/private/compiler/match.rkt b/collects/redex/private/compiler/match.rkt
index fc75214b05..8d6d96a3b9 100644
--- a/collects/redex/private/compiler/match.rkt
+++ b/collects/redex/private/compiler/match.rkt
@@ -1740,7 +1740,7 @@
   
   
   
-  ; if a one-rowed matrix is the the result, assume that the matching isn't over and just update the eqs
+  ; if a one-rowed matrix is the result, assume that the matching isn't over and just update the eqs
   #;((Build-Term-Let (eqs ...) (matrix (x_1 ...) (((p_1 ... -> r) eqs_2 ...)) (pvar_1 ...) (pvar_2 ...) natural bool))
      (matrix (x_1 ...) (((p_1 ... -> r) eqs ...)) (pvar_1 ...) (pvar_2 ...) natural bool))
   
diff --git a/collects/scribblings/framework/splash.scrbl b/collects/scribblings/framework/splash.scrbl
index 3c15fe8a8a..e9dc332818 100644
--- a/collects/scribblings/framework/splash.scrbl
+++ b/collects/scribblings/framework/splash.scrbl
@@ -32,7 +32,7 @@ that number to control the gauge along the bottom of the splash screen.
   
   The @racket[draw-spec] determines what the splash window contains. 
   The @racket[splash-title] is used as the title of the window and the @racket[width-default] determines
-  how many progress steps the gauge in the the splash screen should
+  how many progress steps the gauge in the splash screen should
   contain if there is no preference saved for the splash screen width.
   The splash library uses @racket[get-preference] and @racket[put-preferences]
   to store preferences, using 
diff --git a/collects/scribblings/raco/make.scrbl b/collects/scribblings/raco/make.scrbl
index cdbe3ee883..0c226af111 100644
--- a/collects/scribblings/raco/make.scrbl
+++ b/collects/scribblings/raco/make.scrbl
@@ -338,7 +338,7 @@ source in an namespace that iniitially imports @racketmodname[scheme].
 
 Outside of a module, top-level @racket[define-syntaxes],
 @racket[module], @racket[#%require],
-@racket[define-values-for-syntax], and and @racket[begin] expressions
+@racket[define-values-for-syntax], and @racket[begin] expressions
 are handled specially by @exec{raco make --no-deps}: the compile-time
 portion of the expression is evaluated, because it might affect later
 expressions.
diff --git a/collects/scribblings/reference/exns.scrbl b/collects/scribblings/reference/exns.scrbl
index 88a71e739b..fec47f349e 100644
--- a/collects/scribblings/reference/exns.scrbl
+++ b/collects/scribblings/reference/exns.scrbl
@@ -291,7 +291,7 @@ fails.}
 @defform[(with-handlers ([pred-expr handler-expr] ...)
            body ...+)]{
 
-Evaluates each @racket[pred-expr] and and @racket[handler-expr] in the
+Evaluates each @racket[pred-expr] and @racket[handler-expr] in the
 order that they are specified, and then evaluates the @racket[body]s
 with a new exception handler during the its dynamic extent.
 
diff --git a/collects/scribblings/reference/pairs.scrbl b/collects/scribblings/reference/pairs.scrbl
index 5c7b6893db..28abda429d 100644
--- a/collects/scribblings/reference/pairs.scrbl
+++ b/collects/scribblings/reference/pairs.scrbl
@@ -979,7 +979,7 @@ instead, parts of @scheme[v] are copied as necessary to construct
 the resulting graph, where at most one copy is created for any given
 value.
 
-Since the copied vales can be immutable, and since the copy is also
+Since the copied values can be immutable, and since the copy is also
 immutable, @scheme[make-reader-graph] can create cycles involving only
 immutable pairs, vectors, boxes, and hash tables.
 
diff --git a/collects/scribblings/reference/unsafe.scrbl b/collects/scribblings/reference/unsafe.scrbl
index 3125d4c37b..c7bb9566cd 100644
--- a/collects/scribblings/reference/unsafe.scrbl
+++ b/collects/scribblings/reference/unsafe.scrbl
@@ -71,7 +71,7 @@ the result is always a @tech{fixnum}. The @scheme[unsafe-fxlshift] and
 @scheme[unsafe-fxrshift] is a negative (i.e., right) shift, where the
 number of bits to shift must be less than the number of bits used to
 represent a @tech{fixnum}. In the case of @scheme[unsafe-fxlshift],
-bits in the result beyond the the number of bits used to represent a
+bits in the result beyond the number of bits used to represent a
 @tech{fixnum} are effectively replaced with a copy of the high bit.}
 
 
diff --git a/collects/syntax/scribblings/parse/debug.scrbl b/collects/syntax/scribblings/parse/debug.scrbl
index ecaa44f8f6..b3270aebc4 100644
--- a/collects/syntax/scribblings/parse/debug.scrbl
+++ b/collects/syntax/scribblings/parse/debug.scrbl
@@ -40,7 +40,7 @@ the result is some internal representation of the failure.
          #:contracts ([stx-expr syntax?])]{
 
 Tries to match @scheme[stx-expr] against the @scheme[S-pattern]s. If
-matching succeeds, the the symbol @scheme['success] is
+matching succeeds, the symbol @scheme['success] is
 returned. Otherwise, an S-expression describing the failure is returned.
 
 The failure S-expression shows both the raw set of failures (unsorted)
diff --git a/collects/teachpack/2htdp/scribblings/universe.scrbl b/collects/teachpack/2htdp/scribblings/universe.scrbl
index 637c8eed78..c7b372eff4 100644
--- a/collects/teachpack/2htdp/scribblings/universe.scrbl
+++ b/collects/teachpack/2htdp/scribblings/universe.scrbl
@@ -378,12 +378,12 @@ All @tech{MouseEvent}s are represented via strings:
                integer? integer? (unsyntax @tech{MouseEvent}) 
                (unsyntax @tech{WorldState}))])]{
  tells DrRacket to call @scheme[mouse-expr] on the current world, the current
- @scheme[x] and @scheme[y] coordinates of the mouse, and and a
+ @scheme[x] and @scheme[y] coordinates of the mouse, and a
  @tech{MouseEvent} for every (noticeable) action of the mouse by the
  computer user. The result of the call becomes the current world. 
 
  For @scheme["leave"] and @scheme["enter"] events, the coordinates of the
- mouse click may be outside of the (implicitly) rectangle. That is, the
+ mouse click may be outside of the (implicit) rectangle. That is, the
  coordinates may be negative or larger than the (implicitly) specified
  width and height.
 
diff --git a/collects/teachpack/htdp/scribblings/world.scrbl b/collects/teachpack/htdp/scribblings/world.scrbl
index 9a9542b72f..aec7894c19 100644
--- a/collects/teachpack/htdp/scribblings/world.scrbl
+++ b/collects/teachpack/htdp/scribblings/world.scrbl
@@ -162,7 +162,7 @@ A @tech{KeyEvent} represents key board events, e.g., keys pressed or
 
 @defproc[(on-mouse-event [clack (-> (unsyntax @tech{World}) natural-number/c natural-number/c (unsyntax @tech{MouseEvent}) (unsyntax @tech{World}))]) true]{
    Tell DrRacket to call @scheme[clack] on the current world, the current
-   @scheme[x] and @scheme[y] coordinates of the mouse, and and a
+   @scheme[x] and @scheme[y] coordinates of the mouse, and a
    @tech{MouseEvent} for every action of the mouse by the user of the
    computer. The result of the call becomes the current world.}
 
diff --git a/collects/test-engine/test-info.scm b/collects/test-engine/test-info.scm
index 2018a3c8e6..7b61404f99 100644
--- a/collects/test-engine/test-info.scm
+++ b/collects/test-engine/test-info.scm
@@ -149,6 +149,6 @@
 			    arguments))
 		(result-arguments-list (property-fail-result fail)))]
      [(property-error? fail)
-      (print "check-property encountered the the following error\n:: ~a"
+      (print "check-property encountered the following error\n:: ~a"
 	     (property-error-message fail))])
     (print-string "\n")))
diff --git a/collects/tests/racket/object.rktl b/collects/tests/racket/object.rktl
index ce63778325..8c4486f878 100644
--- a/collects/tests/racket/object.rktl
+++ b/collects/tests/racket/object.rktl
@@ -708,7 +708,7 @@
 
 ;; ------------------------------------------------------------
 ;; ...-final  clauses.
-;; Internal calls to public-final and and pubment are direct,
+;; Internal calls to public-final and pubment are direct,
 ;;  but other calls must be indirect.
 
 (let ()
diff --git a/collects/web-server/scribblings/formlets.scrbl b/collects/web-server/scribblings/formlets.scrbl
index 13702a06a3..b3825d39e9 100755
--- a/collects/web-server/scribblings/formlets.scrbl
+++ b/collects/web-server/scribblings/formlets.scrbl
@@ -139,7 +139,7 @@ to be @emph{syntactically} an @|xexpr|. You may discover you want to use a more
 
 @defform[(formlet* rendering-expr yields-expr)]{
  Constructs a @tech{formlet} where @racket[rendering-expr] is evaluated (with caveats) to construct the rendering
- and the processing result is the evaluation of the the @racket[yields-expr] expression.
+ and the processing result is the evaluation of the @racket[yields-expr] expression.
  The @racket[rendering-expr] should evaluate to an "@xexpr" that may embed the results of the following forms
  that only have meaning within @racket[formlet*]: