diff --git a/README.md b/README.md
index 8e569bbf..bd4945a9 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # libuv
 
 libuv is a new platform layer for Node. Its purpose is to abstract IOCP on
-windows and libev on Unix systems. We intend to eventually contain all
+Windows and libev on Unix systems. We intend to eventually contain all
 platform differences in this library.
 
 http://nodejs.org/
diff --git a/include/uv.h b/include/uv.h
index 6eaf6355..bed0276c 100644
--- a/include/uv.h
+++ b/include/uv.h
@@ -106,7 +106,7 @@ typedef intptr_t ssize_t;
   XX( 35, ENOSYS, "function not implemented") \
   XX( 36, EPIPE, "broken pipe") \
   XX( 37, EPROTO, "protocol error") \
-  XX( 38, EPROTONOSUPPORT, "protocol not suppored") \
+  XX( 38, EPROTONOSUPPORT, "protocol not supported") \
   XX( 39, EPROTOTYPE, "protocol wrong type for socket") \
   XX( 40, ETIMEDOUT, "connection timed out") \
   XX( 41, ECHARSET, "") \
@@ -263,7 +263,7 @@ typedef void (*uv_after_work_cb)(uv_work_t* req);
 * This will be called repeatedly after the uv_fs_event_t is initialized.
 * If uv_fs_event_t was initialized with a directory the filename parameter
 * will be a relative path to a file contained in the directory.
-* The events paramenter is an ORed mask of enum uv_fs_event elements.
+* The events parameter is an ORed mask of enum uv_fs_event elements.
 */
 typedef void (*uv_fs_event_cb)(uv_fs_event_t* handle, const char* filename,
     int events, int status);
@@ -315,8 +315,8 @@ UV_PRIVATE_REQ_TYPES
  *
  * Shutdown the outgoing (write) side of a duplex stream. It waits for
  * pending write requests to complete. The handle should refer to a
- * initialized stream. req should be an uninitalized shutdown request
- * struct. The cb is a called after shutdown is complete.
+ * initialized stream. req should be an uninitialized shutdown request
+ * struct. The cb is called after shutdown is complete.
  */
 UV_EXTERN int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle,
     uv_shutdown_cb cb);
@@ -509,7 +509,7 @@ UV_EXTERN int uv_tcp_getpeername(uv_tcp_t* handle, struct sockaddr* name,
  * uv_tcp_connect, uv_tcp_connect6
  * These functions establish IPv4 and IPv6 TCP connections. Provide an
  * initialized TCP handle and an uninitialized uv_connect_t*. The callback
- * will be made when the connection is estabished.
+ * will be made when the connection is established.
  */
 UV_EXTERN int uv_tcp_connect(uv_connect_t* req, uv_tcp_t* handle,
     struct sockaddr_in address, uv_connect_cb cb);
@@ -884,7 +884,7 @@ UV_EXTERN int uv_timer_again(uv_timer_t* timer);
 
 /*
  * Set the repeat value. Note that if the repeat value is set from a timer
- * callback it does not immediately take effect. If the timer was nonrepeating
+ * callback it does not immediately take effect. If the timer was non-repeating
  * before, it will have been stopped. If it was repeating, then the old repeat
  * value will have been used to schedule the next timeout.
  */
@@ -938,7 +938,7 @@ typedef struct uv_process_options_s {
   const char* file; /* Path to program to execute. */
   /*
    * Command line arguments. args[0] should be the path to the program. On
-   * Windows this uses CreateProcess which concatinates the arguments into a
+   * Windows this uses CreateProcess which concatenates the arguments into a
    * string this can cause some strange errors. See the note at
    * windows_verbatim_arguments.
    */
@@ -962,7 +962,7 @@ typedef struct uv_process_options_s {
   /*
    * The user should supply pointers to initialized uv_pipe_t structs for
    * stdio. This is used to to send or receive input from the subprocess.
-   * The user is reponsible for calling uv_close on them.
+   * The user is responsible for calling uv_close on them.
    */
   uv_pipe_t* stdin_stream;
   uv_pipe_t* stdout_stream;
@@ -1022,7 +1022,7 @@ UV_EXTERN int uv_queue_work(uv_loop_t* loop, uv_work_t* req,
  * uninitialized uv_fs_t object.
  *
  * uv_fs_req_cleanup() must be called after completion of the uv_fs_
- * function to free any internal memory allocations associted with the
+ * function to free any internal memory allocations associated with the
  * request.
  */
 
diff --git a/src/win/cares.c b/src/win/cares.c
index f146c31a..f504bf96 100644
--- a/src/win/cares.c
+++ b/src/win/cares.c
@@ -62,7 +62,7 @@ static void CALLBACK uv_ares_socksignal_tp(void* parameter,
     /* do not fail if error, thread may run after socket close */
     /* The code assumes that c-ares will write all pending data in the */
     /* callback, unless the socket would block. We can clear the state here */
-    /* to avoid unecessary signals. */
+    /* to avoid unnecessary signals. */
     WSAEnumNetworkEvents(sockhandle->sock,
                          sockhandle->h_event,
                          &network_events);
@@ -113,7 +113,7 @@ static void uv_ares_sockstate_cb(void *data, ares_socket_t sock, int read,
   if (read == 0 && write == 0) {
     /* if read and write are 0, cleanup existing data */
     /* The code assumes that c-ares does a callback with read = 0 and */
-    /* write = 0 when the socket is closed. After we recieve this we stop */
+    /* write = 0 when the socket is closed. After we receive this we stop */
     /* monitoring the socket. */
     if (uv_handle_ares != NULL) {
       uv_req_t* uv_ares_req;
@@ -244,7 +244,7 @@ void uv_process_ares_cleanup_req(uv_loop_t* loop, uv_ares_task_t* handle,
       }
     }
   } else {
-    /* stil busy - repost and try again */
+    /* still busy - repost and try again */
     POST_COMPLETION_FOR_REQ(loop, req);
   }
 }
diff --git a/src/win/core.c b/src/win/core.c
index e6bcc5fe..72fee1c8 100644
--- a/src/win/core.c
+++ b/src/win/core.c
@@ -91,7 +91,7 @@ static void uv_loop_init(uv_loop_t* loop) {
 
 
 static void uv_default_loop_init(void) {
-  /* Intialize libuv itself first */
+  /* Initialize libuv itself first */
   uv_once(&uv_init_guard_, uv_init);
 
   /* Initialize the main loop */
diff --git a/src/win/pipe.c b/src/win/pipe.c
index bd187da5..5dada4f9 100644
--- a/src/win/pipe.c
+++ b/src/win/pipe.c
@@ -249,7 +249,7 @@ void uv_pipe_endgame(uv_loop_t* loop, uv_pipe_t* handle) {
       return;
     }
 
-    /* Run FlushFileBuffers in the thhead pool. */
+    /* Run FlushFileBuffers in the thread pool. */
     result = QueueUserWorkItem(pipe_shutdown_thread_proc,
                                req,
                                WT_EXECUTELONGFUNCTION);
diff --git a/src/win/process.c b/src/win/process.c
index 61abb6f9..3d649835 100644
--- a/src/win/process.c
+++ b/src/win/process.c
@@ -254,7 +254,7 @@ static wchar_t* path_search_walk_ext(const wchar_t *dir,
  * - CMD does not trim leading/trailing whitespace from path/pathex entries
  *   nor from the environment variables as a whole.
  *
- * - When cmd.exe cannot read a directory, it wil just skip it and go on
+ * - When cmd.exe cannot read a directory, it will just skip it and go on
  *   searching. However, unlike posix-y systems, it will happily try to run a
  *   file that is not readable/executable; if the spawn fails it will not
  *   continue searching.
@@ -400,7 +400,7 @@ wchar_t* quote_cmd_arg(const wchar_t *source, wchar_t *target) {
   }
 
   /*
-   * Expected intput/output:
+   * Expected input/output:
    *   input : hello"world
    *   output: "hello\"world"
    *   input : hello""world
@@ -1018,7 +1018,7 @@ int uv_spawn(uv_loop_t* loop, uv_process_t* process,
 
   } else {
     /* CreateProcessW failed, but this failure should be delivered */
-    /* asynchronously to retain unix compatibility. So pretent spawn */
+    /* asynchronously to retain unix compatibility. So pretend spawn */
     /* succeeded, and start a thread instead that prints an error */
     /* to the child's intended stderr. */
     process->spawn_errno = GetLastError();
@@ -1046,7 +1046,7 @@ done:
     close_child_stdio(process);
   } else {
     /* We're keeping the handles open, the thread pool is going to have */
-    /* it's way with them. But at least make them noninheritable. */
+    /* it's way with them. But at least make them non-inheritable. */
     int i;
     for (i = 0; i < COUNTOF(process->child_stdio); i++) {
       SetHandleInformation(child_stdio[i], HANDLE_FLAG_INHERIT, 0);
diff --git a/src/win/tcp.c b/src/win/tcp.c
index 5506ede0..dee77875 100644
--- a/src/win/tcp.c
+++ b/src/win/tcp.c
@@ -1084,7 +1084,7 @@ int uv_tcp_duplicate_socket(uv_tcp_t* handle, int pid,
   /* 
    * We're about to share the socket with another process.  Because
    * this is a listening socket, we assume that the other process will
-   * be accepting conections on it.  So, before sharing the socket
+   * be accepting connections on it.  So, before sharing the socket
    * with another process, we call listen here in the parent process.
    * This needs to be modified if the socket is shared with
    * another process for anything other than accepting connections.
@@ -1137,7 +1137,7 @@ int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable) {
 
   handle->flags |= UV_HANDLE_TCP_SINGLE_ACCEPT;
 
-  /* Flip the changing flag if we have already queueed multiple accepts. */
+  /* Flip the changing flag if we have already queued multiple accepts. */
   if (handle->flags & UV_HANDLE_LISTENING) {
     handle->flags |= UV_HANDLE_TCP_ACCEPT_STATE_CHANGING;
   }
diff --git a/src/win/timer.c b/src/win/timer.c
index 58f2eef0..555d71ea 100644
--- a/src/win/timer.c
+++ b/src/win/timer.c
@@ -86,7 +86,7 @@ uint64_t uv_hrtime(void) {
     return 0;
   }
 
-  /* Because we have no guarantee about the order of magniture of the */
+  /* Because we have no guarantee about the order of magnitude of the */
   /* performance counter frequency, and there may not be much headroom to */
   /* multiply by NANOSEC without overflowing, we use 128-bit math instead. */
   return ((uint64_t) counter.LowPart * NANOSEC / uv_hrtime_frequency_) +
diff --git a/src/win/tty.c b/src/win/tty.c
index a7285127..b90d2cfe 100644
--- a/src/win/tty.c
+++ b/src/win/tty.c
@@ -739,7 +739,7 @@ int uv_tty_read_start(uv_tty_t* handle, uv_alloc_cb alloc_cb,
   handle->read_cb = read_cb;
   handle->alloc_cb = alloc_cb;
 
-  /* If reading was stopped and then started again, there could stell be a */
+  /* If reading was stopped and then started again, there could still be a */
   /* read request pending. */
   if (handle->flags & UV_HANDLE_READ_PENDING) {
     return 0;
diff --git a/src/win/udp.c b/src/win/udp.c
index 3beb8ab9..0299e775 100644
--- a/src/win/udp.c
+++ b/src/win/udp.c
@@ -362,7 +362,7 @@ int uv_udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloc_cb,
   handle->recv_cb = recv_cb;
   handle->alloc_cb = alloc_cb;
 
-  /* If reading was stopped and then started again, there could stell be a */
+  /* If reading was stopped and then started again, there could still be a */
   /* recv request pending. */
   if (!(handle->flags & UV_HANDLE_READ_PENDING))
     uv_udp_queue_recv(loop, handle);
diff --git a/test/benchmark-ping-pongs.c b/test/benchmark-ping-pongs.c
index c36215c1..d42e7063 100644
--- a/test/benchmark-ping-pongs.c
+++ b/test/benchmark-ping-pongs.c
@@ -186,7 +186,7 @@ static void pinger_new() {
   pinger->state = 0;
   pinger->pongs = 0;
 
-  /* Try to connec to the server and do NUM_PINGS ping-pongs. */
+  /* Try to connect to the server and do NUM_PINGS ping-pongs. */
   r = uv_tcp_init(loop, &pinger->tcp);
   ASSERT(!r);
 
diff --git a/test/runner-win.c b/test/runner-win.c
index fc08839e..6b6d500c 100644
--- a/test/runner-win.c
+++ b/test/runner-win.c
@@ -156,7 +156,7 @@ int process_wait(process_info_t *vec, int n, int timeout) {
   HANDLE handles[MAXIMUM_WAIT_OBJECTS];
   DWORD timeout_api, result;
 
-  /* If there's nothing to wait for, return immedately. */
+  /* If there's nothing to wait for, return immediately. */
   if (n == 0)
     return 0;
 
diff --git a/test/runner-win.h b/test/runner-win.h
index a2c8b6f3..f69976e9 100644
--- a/test/runner-win.h
+++ b/test/runner-win.h
@@ -19,10 +19,10 @@
  * IN THE SOFTWARE.
  */
 
-/* Don't complain about _snprintf being unsecure. */
+/* Don't complain about _snprintf being insecure. */
 #define _CRT_SECURE_NO_WARNINGS
 
-/* Dont complain about write(), fileno() etc. being deprecated. */
+/* Don't complain about write(), fileno() etc. being deprecated. */
 #pragma warning(disable : 4996)
 
 
diff --git a/test/runner.c b/test/runner.c
index 73a3864e..daa8a2e4 100644
--- a/test/runner.c
+++ b/test/runner.c
@@ -218,7 +218,7 @@ out:
   } else if (benchmark_output) {
     switch (process_output_size(main_proc)) {
      case -1:
-      LOGF("%s: (unavailabe)\n", test);
+      LOGF("%s: (unavailable)\n", test);
       break;
 
      case 0:
diff --git a/test/test-callback-stack.c b/test/test-callback-stack.c
index 4af63648..4983b651 100644
--- a/test/test-callback-stack.c
+++ b/test/test-callback-stack.c
@@ -138,7 +138,7 @@ static void write_cb(uv_write_t* req, int status) {
   /* After the data has been sent, we're going to wait for a while, then */
   /* start reading. This makes us certain that the message has been echoed */
   /* back to our receive buffer when we start reading. This maximizes the */
-  /* tempation for the backend to use dirty stack for calling read_cb. */
+  /* temptation for the backend to use dirty stack for calling read_cb. */
   nested++;
   r = uv_timer_init(uv_default_loop(), &timer);
   ASSERT(r == 0);
diff --git a/test/test-connection-fail.c b/test/test-connection-fail.c
index 2762aa28..1c5a31d1 100644
--- a/test/test-connection-fail.c
+++ b/test/test-connection-fail.c
@@ -97,7 +97,7 @@ void connection_fail(uv_connect_cb connect_cb) {
   /* There should be no servers listening on this port. */
   server_addr = uv_ip4_addr("127.0.0.1", TEST_PORT);
 
-  /* Try to connec to the server and do NUM_PINGS ping-pongs. */
+  /* Try to connect to the server and do NUM_PINGS ping-pongs. */
   r = uv_tcp_init(uv_default_loop(), &tcp);
   ASSERT(!r);
 
diff --git a/test/test-delayed-accept.c b/test/test-delayed-accept.c
index 78531f68..990444ef 100644
--- a/test/test-delayed-accept.c
+++ b/test/test-delayed-accept.c
@@ -152,7 +152,7 @@ static void connect_cb(uv_connect_t* req, int status) {
   ASSERT(status == 0);
 
   /* Not that the server will send anything, but otherwise we'll never know */
-  /* when te server closes the connection. */
+  /* when the server closes the connection. */
   r = uv_read_start((uv_stream_t*)(req->handle), alloc_cb, read_cb);
   ASSERT(r == 0);
 
diff --git a/test/test-fs.c b/test/test-fs.c
index 28b914a7..34f891c1 100644
--- a/test/test-fs.c
+++ b/test/test-fs.c
@@ -19,7 +19,7 @@
  * IN THE SOFTWARE.
  */
 
-/* FIXME we shouldnt need to branch in this file */
+/* FIXME we shouldn't need to branch in this file */
 #define UNIX (defined(__unix__) || defined(__POSIX__) || defined(__APPLE__))
 
 #include "uv.h"
diff --git a/test/test-getsockname.c b/test/test-getsockname.c
index 5dac88b7..ff28beb9 100644
--- a/test/test-getsockname.c
+++ b/test/test-getsockname.c
@@ -83,7 +83,7 @@ static void check_sockname(struct sockaddr* addr, const char* compare_ip,
   char check_ip[17];
   int r;
 
-  /* Both adresses should be ipv4 */
+  /* Both addresses should be ipv4 */
   ASSERT(check_addr.sin_family == AF_INET);
   ASSERT(compare_addr.sin_family == AF_INET);
 
diff --git a/test/test-loop-handles.c b/test/test-loop-handles.c
index 9a76cc53..425dcf63 100644
--- a/test/test-loop-handles.c
+++ b/test/test-loop-handles.c
@@ -58,7 +58,7 @@
  *   being started by a check_1 watcher. It verifies that a watcher is
  *   implicitly stopped when closed, and that a watcher can close itself
  *   safely.
- * - There is a repeating timer. It does not keep te event loop alive
+ * - There is a repeating timer. It does not keep the event loop alive
  *   (ev_unref) but makes sure that the loop keeps polling the system for
  *   events.
  */
diff --git a/test/test-ping-pong.c b/test/test-ping-pong.c
index b73b4ce4..5c3de3b4 100644
--- a/test/test-ping-pong.c
+++ b/test/test-ping-pong.c
@@ -154,7 +154,7 @@ static void tcp_pinger_v6_new() {
   pinger->state = 0;
   pinger->pongs = 0;
 
-  /* Try to connec to the server and do NUM_PINGS ping-pongs. */
+  /* Try to connect to the server and do NUM_PINGS ping-pongs. */
   r = uv_tcp_init(uv_default_loop(), &pinger->stream.tcp);
   pinger->stream.tcp.data = pinger;
   ASSERT(!r);
@@ -179,7 +179,7 @@ static void tcp_pinger_new() {
   pinger->state = 0;
   pinger->pongs = 0;
 
-  /* Try to connec to the server and do NUM_PINGS ping-pongs. */
+  /* Try to connect to the server and do NUM_PINGS ping-pongs. */
   r = uv_tcp_init(uv_default_loop(), &pinger->stream.tcp);
   pinger->stream.tcp.data = pinger;
   ASSERT(!r);
@@ -203,7 +203,7 @@ static void pipe_pinger_new() {
   pinger->state = 0;
   pinger->pongs = 0;
 
-  /* Try to connec to the server and do NUM_PINGS ping-pongs. */
+  /* Try to connect to the server and do NUM_PINGS ping-pongs. */
   r = uv_pipe_init(uv_default_loop(), &pinger->stream.pipe, 0);
   pinger->stream.pipe.data = pinger;
   ASSERT(!r);
diff --git a/test/test-tty.c b/test/test-tty.c
index 60aedf39..d1f6ae6f 100644
--- a/test/test-tty.c
+++ b/test/test-tty.c
@@ -28,7 +28,7 @@ TEST_IMPL(tty) {
   uv_loop_t* loop = uv_default_loop();
 
   /*
-   * Not necessarally a problem if this assert goes off. E.G you are piping
+   * Not necessarily a problem if this assert goes off. E.G you are piping
    * this test to a file. 0 == stdin.
    */
   ASSERT(UV_TTY == uv_guess_handle(0));