diff --git a/lib/cluster.js b/lib/cluster.js
index dfd13cd926c..504c399ef78 100644
--- a/lib/cluster.js
+++ b/lib/cluster.js
@@ -61,15 +61,15 @@ cluster.isMaster = ! cluster.isWorker;
 
 // The worker object is only used in a worker
 cluster.worker = cluster.isWorker ? {} : null;
-// The workers array is oly used in the naster
+// The workers array is only used in the master
 cluster.workers = cluster.isMaster ? {} : null;
 
 // Settings object
 var settings = cluster.settings = {};
 
-// Simple function there call a function on each worker
+// Simple function to call a function on each worker
 function eachWorker(cb) {
-  // Go througe all workers
+  // Go through all workers
   for (var id in cluster.workers) {
     if (cluster.workers.hasOwnProperty(id)) {
       cb(cluster.workers[id]);
@@ -94,7 +94,7 @@ cluster.setupMaster = function(options) {
   // This can only be called from the master.
   assert(cluster.isMaster);
 
-  // Don't allow this function to run more that once
+  // Don't allow this function to run more than once
   if (masterStarted) return;
   masterStarted = true;
 
@@ -121,7 +121,7 @@ function isInternalMessage(message) {
           message.cmd.indexOf(INTERNAL_PREFIX) === 0);
 }
 
-// Modyfi message object to be internal
+// Modify message object to be internal
 function internalMessage(inMessage) {
   var outMessage = util._extend({}, inMessage);
 
@@ -131,10 +131,10 @@ function internalMessage(inMessage) {
   return outMessage;
 }
 
-// Handle callback messges
+// Handle callback messages
 function handleResponse(outMessage, outHandle, inMessage, inHandle, worker) {
 
-  // The message there will be send
+  // The message there will be sent
   var message = internalMessage(outMessage);
 
   // callback id - will be undefined if not set
@@ -146,7 +146,7 @@ function handleResponse(outMessage, outHandle, inMessage, inHandle, worker) {
     delete queryCallbacks[inMessage._queryEcho];
   }
 
-  // Send if outWrap do contain something useful
+  // Send if outWrap contains something useful
   if (!(outMessage === undefined && message._queryEcho === undefined)) {
     sendInternalMessage(worker, message, outHandle);
   }
@@ -156,7 +156,7 @@ function handleResponse(outMessage, outHandle, inMessage, inHandle, worker) {
 var messageHandler = {};
 function handleMessage(worker, inMessage, inHandle) {
 
-  //Remove internal prefix
+  // Remove internal prefix
   var message = util._extend({}, inMessage);
   message.cmd = inMessage.cmd.substr(INTERNAL_PREFIX.length);
 
@@ -166,18 +166,18 @@ function handleMessage(worker, inMessage, inHandle) {
     handleResponse(outMessage, outHandler, inMessage, inHandle, worker);
   }
 
-  // Run handler if it exist
+  // Run handler if it exists
   if (messageHandler[message.cmd]) {
     messageHandler[message.cmd](message, worker, respond);
   }
 
-  // Send respond if it wasn't done
+  // Send respond if it hasn't been called yet
   if (respondUsed === false) {
     respond();
   }
 }
 
-// Messages to the master will be handled using this methods
+// Messages to the master will be handled using these methods
 if (cluster.isMaster) {
 
   // Handle online messages from workers
@@ -188,11 +188,11 @@ if (cluster.isMaster) {
     cluster.emit('online', worker);
   };
 
-  // Handle queryServer messages form workers
+  // Handle queryServer messages from workers
   messageHandler.queryServer = function(message, worker, send) {
 
-    // This sequence of infomation is unique to the connection but not
-    // to the worker
+    // This sequence of information is unique to the connection
+    // but not to the worker
     var args = [message.address, message.port, message.addressType];
     var key = args.join(':');
     var handler;
@@ -212,7 +212,7 @@ if (cluster.isMaster) {
 
     worker.state = 'listening';
 
-    // Emit listining, now that we know the worker is listning
+    // Emit listening, now that we know the worker is listening
     worker.emit('listening', worker, {
       address: message.address,
       port: message.port,
@@ -232,7 +232,7 @@ if (cluster.isMaster) {
 
 }
 
-// Messages to a worker will be handled using this methods
+// Messages to a worker will be handled using these methods
 else if (cluster.isWorker) {
 
   // Handle worker.disconnect from master
@@ -246,7 +246,7 @@ function toDecInt(value) {
   return isNaN(value) ? null : value;
 }
 
-// Create a worker object, there works both for master and worker
+// Create a worker object, that works both for master and worker
 function Worker(customEnv) {
   if (!(this instanceof Worker)) return new Worker();
 
@@ -353,7 +353,7 @@ function sendInternalMessage(worker, message/*, handler, callback*/) {
 // Send message to worker or master
 Worker.prototype.send = function() {
 
-  //You could also just use process.send in a worker
+  // You could also just use process.send in a worker
   this.process.send.apply(this.process, arguments);
 };
 
@@ -379,7 +379,7 @@ Worker.prototype.destroy = function() {
     // Channel is open
     if (this.process.connected) {
 
-      // Inform master that is is suicide and then kill
+      // Inform master to suicide and then kill
       sendInternalMessage(this, {cmd: 'suicide'}, function() {
         process.exit(0);
       });
@@ -394,8 +394,8 @@ Worker.prototype.destroy = function() {
   }
 };
 
-// The .disconnect function will close all server and then disconnect
-// the IPC channel.
+// The .disconnect function will close all servers
+// and then disconnect the IPC channel.
 if (cluster.isMaster) {
   // Used in master
   Worker.prototype.disconnect = function() {
@@ -414,7 +414,7 @@ if (cluster.isMaster) {
     // keep track of open servers
     var servers = Object.keys(serverListeners).length;
     var progress = new ProgressTracker(servers, function() {
-      // there are no more servers open so we will close the IPC channel.
+      // There are no more servers open so we will close the IPC channel.
       // Closing the IPC channel will emit a disconnect event
       // in both master and worker on the process object.
       // This event will be handled by prepareExit.
@@ -422,8 +422,8 @@ if (cluster.isMaster) {
     });
 
     // depending on where this function was called from (master or worker)
-    // the suicide state has allready been set.
-    // But it dosn't really matter if we set it again.
+    // The suicide state has already been set,
+    // but it doesn't really matter if we set it again.
     sendInternalMessage(this, {cmd: 'suicide'}, function() {
       // in case there are no servers
       progress.check();
@@ -433,7 +433,7 @@ if (cluster.isMaster) {
       for (var key in serverListeners) {
         server = serverListeners[key];
 
-        // in case the server is closed we wont close it again
+        // in case the server is closed we won't close it again
         if (server._handle === null) {
           progress.done();
           continue;
@@ -452,7 +452,7 @@ cluster.fork = function(env) {
   // This can only be called from the master.
   assert(cluster.isMaster);
 
-  // Make sure that the master has been initalized
+  // Make sure that the master has been initialized
   cluster.setupMaster();
 
   return (new cluster.Worker(env));
@@ -481,7 +481,7 @@ cluster.disconnect = function(callback) {
     worker.disconnect();
   });
 
-  // in case there wasn't any workers
+  // in case there weren't any workers
   progress.check();
 };
 
@@ -491,8 +491,8 @@ cluster._setupWorker = function() {
   // Get worker class
   var worker = cluster.worker = new Worker();
 
-  // when the worker is disconnected from parent accidentally
   // we will terminate the worker
+  // when the worker is disconnected from the parent accidentally
   process.once('disconnect', function() {
     if (worker.suicide !== true) {
       process.exit(0);
@@ -532,7 +532,7 @@ cluster._getServer = function(tcpSelf, address, port, addressType, cb) {
     addressType: addressType
   };
 
-  // The callback will be stored until the master has responed
+  // The callback will be stored until the master has responded
   sendInternalMessage(cluster.worker, message, function(msg, handle) {
     cb(handle);
   });