diff --git a/src/buttongroup.js b/src/buttongroup.js
index daee211c..f8b9c3ab 100644
--- a/src/buttongroup.js
+++ b/src/buttongroup.js
@@ -83,7 +83,7 @@ $.ButtonGroup = function( options ) {
     $.setElementTouchActionNone( this.element );
 
     /**
-     * Tracks mouse/touch/key events accross the group of buttons.
+     * Tracks mouse/touch/key events across the group of buttons.
      * @member {OpenSeadragon.MouseTracker} tracker
      * @memberof OpenSeadragon.ButtonGroup#
      */
diff --git a/src/control.js b/src/control.js
index 5a63c517..d91e6b89 100644
--- a/src/control.js
+++ b/src/control.js
@@ -167,7 +167,7 @@ $.Control.prototype = {
     /**
      * Determines if the control is currently visible.
      * @function
-     * @return {Boolean} true if currenly visible, false otherwise.
+     * @return {Boolean} true if currently visible, false otherwise.
      */
     isVisible: function() {
         return this.wrapper.style.display != "none";
diff --git a/src/drawer.js b/src/drawer.js
index f3ecada4..7c4852cb 100644
--- a/src/drawer.js
+++ b/src/drawer.js
@@ -48,7 +48,7 @@ $.Drawer = function( options ) {
 
     $.console.assert( options.viewer, "[Drawer] options.viewer is required" );
 
-    //backward compatibility for positional args while prefering more
+    //backward compatibility for positional args while preferring more
     //idiomatic javascript options object as the only argument
     var args  = arguments;
 
diff --git a/src/imagetilesource.js b/src/imagetilesource.js
index 417243c6..e176576f 100644
--- a/src/imagetilesource.js
+++ b/src/imagetilesource.js
@@ -198,7 +198,7 @@
 
         // private
         //
-        // Builds the differents levels of the pyramid if possible
+        // Builds the different levels of the pyramid if possible
         // (i.e. if canvas API enabled and no canvas tainting issue).
         _buildLevels: function () {
             var levels = [{
diff --git a/src/legacytilesource.js b/src/legacytilesource.js
index e24dbbe6..3defe342 100644
--- a/src/legacytilesource.js
+++ b/src/legacytilesource.js
@@ -190,7 +190,7 @@ $.extend( $.LegacyTileSource.prototype, $.TileSource.prototype, /** @lends OpenS
 } );
 
 /**
- * This method removes any files from the Array which dont conform to our
+ * This method removes any files from the Array which don't conform to our
  * basic requirements for a 'level' in the LegacyTileSource.
  * @private
  * @inner
diff --git a/src/navigator.js b/src/navigator.js
index c1bfc6f1..115d052d 100644
--- a/src/navigator.js
+++ b/src/navigator.js
@@ -152,7 +152,7 @@ $.Navigator = function( options ){
         style.border        = borderWidth + 'px solid ' + options.displayRegionColor;
         style.margin        = '0px';
         style.padding       = '0px';
-        //TODO: IE doesnt like this property being set
+        //TODO: IE doesn't like this property being set
         //try{ style.outline  = '2px auto #909'; }catch(e){/*ignore*/}
 
         style.background    = 'transparent';
@@ -571,7 +571,7 @@ function onCanvasScroll( event ) {
         originalEvent: event.originalEvent
     });
 
-    //dont scroll the page up and down if the user is scrolling
+    //don't scroll the page up and down if the user is scrolling
     //in the navigator
     return false;
 }
diff --git a/src/openseadragon.js b/src/openseadragon.js
index 74851e94..af2dfca2 100644
--- a/src/openseadragon.js
+++ b/src/openseadragon.js
@@ -247,7 +247,7 @@
   *     The maximum ratio to allow a zoom-in to affect the highest level pixel
   *     ratio. This can be set to Infinity to allow 'infinite' zooming into the
   *     image though it is less effective visually if the HTML5 Canvas is not
-  *     availble on the viewing device.
+  *     available on the viewing device.
   *
   * @property {Number} [smoothTileEdgesMinZoom=1.1]
   *     A zoom percentage ( where 1 is 100% ) of the highest resolution level.
@@ -441,7 +441,7 @@
   *
   * @property {Number} [controlsFadeDelay=2000]
   *     The number of milliseconds to wait once the user has stopped interacting
-  *     with the interface before begining to fade the controls. Assumes
+  *     with the interface before beginning to fade the controls. Assumes
   *     showNavigationControl and autoHideControls are both true.
   *
   * @property {Number} [controlsFadeLength=1500]
@@ -459,7 +459,7 @@
   * @property {Number} [minPixelRatio=0.5]
   *     The higher the minPixelRatio, the lower the quality of the image that
   *     is considered sufficient to stop rendering a given zoom level.  For
-  *     example, if you are targeting mobile devices with less bandwith you may
+  *     example, if you are targeting mobile devices with less bandwidth you may
   *     try setting this to 1.5 or higher.
   *
   * @property {Boolean} [mouseNavEnabled=true]
@@ -1343,7 +1343,7 @@ function OpenSeadragon( options ){
         /**
          * Determines the position of the upper-left corner of the element.
          * @function
-         * @param {Element|String} element - the elemenet we want the position for.
+         * @param {Element|String} element - the element we want the position for.
          * @returns {OpenSeadragon.Point} - the position of the upper left corner of the element.
          */
         getElementPosition: function( element ) {
@@ -2086,7 +2086,7 @@ function OpenSeadragon( options ){
         /**
          * Similar to OpenSeadragon.delegate, but it does not immediately call
          * the method on the object, returning a function which can be called
-         * repeatedly to delegate the method. It also allows additonal arguments
+         * repeatedly to delegate the method. It also allows additional arguments
          * to be passed during construction which will be added during each
          * invocation, and each invocation can add additional arguments as well.
          *
@@ -2614,7 +2614,7 @@ function OpenSeadragon( options ){
     //TODO: $.console is often used inside a try/catch block which generally
     //      prevents allowings errors to occur with detection until a debugger
     //      is attached.  Although I've been guilty of the same anti-pattern
-    //      I eventually was convinced that errors should naturally propogate in
+    //      I eventually was convinced that errors should naturally propagate in
     //      all but the most special cases.
     /**
      * A convenient alias for console when available, and a simple null
diff --git a/src/overlay.js b/src/overlay.js
index 9d9edd88..af22fa37 100644
--- a/src/overlay.js
+++ b/src/overlay.js
@@ -93,7 +93,7 @@
      * Defines what part of the overlay should be at the specified options.location
      * @param {OpenSeadragon.Overlay.OnDrawCallback} [options.onDraw]
      * @param {Boolean} [options.checkResize=true] Set to false to avoid to
-     * check the size of the overlay everytime it is drawn in the directions
+     * check the size of the overlay every time it is drawn in the directions
      * which are not scaled. It will improve performances but will cause a
      * misalignment if the overlay size changes.
      * @param {Number} [options.width] The width of the overlay in viewport
diff --git a/src/point.js b/src/point.js
index 2d042416..7e55ec53 100644
--- a/src/point.js
+++ b/src/point.js
@@ -84,10 +84,10 @@ $.Point.prototype = {
     },
 
     /**
-     * Substract another Point to this point and return a new Point.
+     * Subtract another Point to this point and return a new Point.
      * @function
-     * @param {OpenSeadragon.Point} point The point to substract vector components.
-     * @returns {OpenSeadragon.Point} A new point representing the substraction of the
+     * @param {OpenSeadragon.Point} point The point to subtract vector components.
+     * @returns {OpenSeadragon.Point} A new point representing the subtraction of the
      *  vector components
      */
     minus: function( point ) {
diff --git a/src/referencestrip.js b/src/referencestrip.js
index e1074572..62be61f8 100644
--- a/src/referencestrip.js
+++ b/src/referencestrip.js
@@ -53,7 +53,7 @@ var THIS = {};
  *  TODO:   The difficult part of this feature is figuring out how to express
  *          this functionality as a combination of the functionality already
  *          provided by Drawer, Viewport, TileSource, and Navigator.  It may
- *          require better abstraction at those points in order to effeciently
+ *          require better abstraction at those points in order to efficiently
  *          reuse those paradigms.
  */
 /**
diff --git a/src/tilesource.js b/src/tilesource.js
index 3386675a..c568e480 100644
--- a/src/tilesource.js
+++ b/src/tilesource.js
@@ -113,7 +113,7 @@ $.TileSource = function( width, height, tileSize, tileOverlap, minLevel, maxLeve
     //by asynchronously fetching their configuration data.
     $.EventSource.call( this );
 
-    //we allow options to override anything we dont treat as
+    //we allow options to override anything we don't treat as
     //required via idiomatic options or which is functionally
     //set depending on the state of the readiness of this tile
     //source
@@ -172,7 +172,7 @@ $.TileSource = function( width, height, tileSize, tileOverlap, minLevel, maxLeve
     }
 
     if (this.url) {
-        //in case the getImageInfo method is overriden and/or implies an
+        //in case the getImageInfo method is overridden and/or implies an
         //async mechanism set some safe defaults first
         this.aspectRatio = 1;
         this.dimensions  = new $.Point( 10, 10 );
diff --git a/src/viewer.js b/src/viewer.js
index 2adf8bb1..9be3e7fa 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -69,7 +69,7 @@ $.Viewer = function( options ) {
         i;
 
 
-    //backward compatibility for positional args while prefering more
+    //backward compatibility for positional args while preferring more
     //idiomatic javascript options object as the only argument
     if( !$.isPlainObject( options ) ){
         options = {
@@ -912,7 +912,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
             nodes,
             i;
 
-        //dont bother modifying the DOM if we are already in full page mode.
+        //don't bother modifying the DOM if we are already in full page mode.
         if ( fullPage == this.isFullPage() ) {
             return this;
         }
@@ -967,7 +967,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
             bodyStyle.height = "100%";
             docStyle.height = "100%";
 
-            //when entering full screen on the ipad it wasnt sufficient to leave
+            //when entering full screen on the ipad it wasn't sufficient to leave
             //the body intact as only only the top half of the screen would
             //respond to touch events on the canvas, while the bottom half treated
             //them as touch events on the document body.  Thus we remove and store
@@ -1906,11 +1906,11 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
      * is closed which include when changing page.
      * @method
      * @param {Element|String|Object} element - A reference to an element or an id for
-     *      the element which will be overlayed. Or an Object specifying the configuration for the overlay.
+     *      the element which will be overlaid. Or an Object specifying the configuration for the overlay.
      *      If using an object, see {@link OpenSeadragon.Overlay} for a list of
      *      all available options.
      * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location - The point or
-     *      rectangle which will be overlayed. This is a viewport relative location.
+     *      rectangle which will be overlaid. This is a viewport relative location.
      * @param {OpenSeadragon.Placement} placement - The position of the
      *      viewport which the location coordinates will be treated as relative
      *      to.
@@ -1969,9 +1969,9 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
      * element id moving it to the new location, relative to the new placement.
      * @method
      * @param {Element|String} element - A reference to an element or an id for
-     *      the element which is overlayed.
+     *      the element which is overlaid.
      * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location - The point or
-     *      rectangle which will be overlayed. This is a viewport relative location.
+     *      rectangle which will be overlaid. This is a viewport relative location.
      * @param {OpenSeadragon.Placement} placement - The position of the
      *      viewport which the location coordinates will be treated as relative
      *      to.
diff --git a/src/viewport.js b/src/viewport.js
index dec8513f..3413dbc1 100644
--- a/src/viewport.js
+++ b/src/viewport.js
@@ -57,7 +57,7 @@
  */
 $.Viewport = function( options ) {
 
-    //backward compatibility for positional args while prefering more
+    //backward compatibility for positional args while preferring more
     //idiomatic javascript options object as the only argument
     var args = arguments;
     if (args.length && args[0] instanceof $.Point) {