diff --git a/include/ftw.h b/include/ftw.h
index d8b110a95e..ae02bcaff7 100644
--- a/include/ftw.h
+++ b/include/ftw.h
@@ -136,7 +136,7 @@ extern "C"
  * Input Parameters:
  *   path    - The 'root' of the directory hierarchy to descend
  *   fn      - The callback function to be invoked as each object in the
- *             heirarchy is encountered.
+ *             hierarchy is encountered.
  *   fdlimit - The fdlimit argument specifies the maximum number of directory
  *             streams or file descriptors or both available for use by ftw()
  *             while traversing the tree.The maximum depth of the directories
@@ -172,7 +172,7 @@ int ftw(FAR const char *path, ftw_cb_t fn, int fdlimit);
  *
  *   path    - The 'root' of the directory hierarchy to descend
  *   fn      - The callback function to be invoked as each object in the
- *             heirarchy is encountered.
+ *             hierarchy is encountered.
  *   fdlimit - The fdlimit argument specifies the maximum number of directory
  *             streams or file descriptors or both available for use by
  *             nftw() while traversing the tree.The maximum depth of the
diff --git a/include/hex2bin.h b/include/hex2bin.h
index 20dbc63ea9..9b5f6745ff 100644
--- a/include/hex2bin.h
+++ b/include/hex2bin.h
@@ -68,7 +68,7 @@
  * Public Types
  ****************************************************************************/
 
-/* Intel HEX data steams are normally in big endian order.  The following
+/* Intel HEX data streams are normally in big endian order.  The following
  * enumeration selects other ordering.
  */
 
diff --git a/include/nuttx/can/can.h b/include/nuttx/can/can.h
index a5b5b8e1b0..ffd316167c 100644
--- a/include/nuttx/can/can.h
+++ b/include/nuttx/can/can.h
@@ -98,7 +98,7 @@
 /* Ioctl commands supported by the upper half CAN driver.
  *
  * CANIOC_RTR:
- *   Description:    Send the given message as a remote request. On sucessful
+ *   Description:    Send the given message as a remote request. On successful
  *                   return, the passed message structure is updated with
  *                   the contents of the received message; i.e. the message
  *                   ID and the standard/extended ID indication bit stay the
diff --git a/include/nuttx/efuse/efuse.h b/include/nuttx/efuse/efuse.h
index 96b15e283a..d4239ae46c 100644
--- a/include/nuttx/efuse/efuse.h
+++ b/include/nuttx/efuse/efuse.h
@@ -78,14 +78,14 @@ typedef struct efuse_desc_s efuse_desc_t;
 /* The efuse_param is used by the application to inform which field(s)
  * will be passed to the ioctl() operation.
  *   - 'efuse_desc_t *field[]': contains one or more field and it
- *     it termined by a NULL to indicate there is no more fields.
+ *     it terminated by a NULL to indicate there is no more fields.
  *     NOTE: normally the application don't need to create these fields
  *           they are mapped inside an arch efuse table and referenced
  *           in a header file inside include/nuttx/efuse/ directory.
  *   - size: how many bits the field(s) use
  *   - data: an application side allocated buffer where the read operation
  *           will store the efuse bits, so the number of allocated bytes
- *           need to be enough to store all bits. For write operaton, this
+ *           need to be enough to store all bits. For write operation, this
  *           pointer contains the bits to be written.
  *
  *  FINAL NOTE: The bit order is architecture dependent (tested only on
diff --git a/include/nuttx/mm/circbuf.h b/include/nuttx/mm/circbuf.h
index c6d291c8da..bbaa237367 100644
--- a/include/nuttx/mm/circbuf.h
+++ b/include/nuttx/mm/circbuf.h
@@ -178,7 +178,7 @@ size_t circbuf_used(FAR struct circbuf_s *circ);
  * Name: circbuf_space
  *
  * Description:
- *   Return the remaing space of the circular buffer.
+ *   Return the remaining space of the circular buffer.
  *
  * Input Parameters:
  *   circ  - Address of the circular buffer to be used.
diff --git a/include/nuttx/net/neighbor.h b/include/nuttx/net/neighbor.h
index 6302e9815e..b1d4a8adc7 100644
--- a/include/nuttx/net/neighbor.h
+++ b/include/nuttx/net/neighbor.h
@@ -1,6 +1,6 @@
 /****************************************************************************
  * include/nuttx/net/neighbor.h
- * Definitions for use with IPv6 Neighor Table
+ * Definitions for use with IPv6 Neighbor Table
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/include/nuttx/nx/nxcursor.h b/include/nuttx/nx/nxcursor.h
index 3774a8bf8d..79cb535ba4 100644
--- a/include/nuttx/nx/nxcursor.h
+++ b/include/nuttx/nx/nxcursor.h
@@ -45,7 +45,7 @@ extern "C"
 #endif
 
 /****************************************************************************
- * Public Functions Defintions
+ * Public Functions Definitions
  ****************************************************************************/
 
 /* The current software cursor implementation is only available under the
diff --git a/include/nuttx/nx/nxglib.h b/include/nuttx/nx/nxglib.h
index 35c992f82a..589c113d26 100644
--- a/include/nuttx/nx/nxglib.h
+++ b/include/nuttx/nx/nxglib.h
@@ -395,7 +395,7 @@ bool nxgl_colorcmp(const nxgl_mxpixel_t color1[CONFIG_NX_NPLANES],
  * Description:
  *   In the general case, a line with width can be represented as a
  *   parallelogram with a triangle at the top and bottom.  Triangles and
- *   parallelograms are both degenerate versions of a trapeziod.  This
+ *   parallelograms are both degenerate versions of a trapezoid.  This
  *   function breaks a wide line into triangles and trapezoids.  This
  *   function also detects other degenerate cases:
  *
diff --git a/include/nuttx/nx/nxtk.h b/include/nuttx/nx/nxtk.h
index c0cb44edc7..6c6aabf430 100644
--- a/include/nuttx/nx/nxtk.h
+++ b/include/nuttx/nx/nxtk.h
@@ -179,7 +179,7 @@ int nxtk_block(NXTKWINDOW hfwnd, FAR void *arg);
  * Name: nxtk_synch
  *
  * Description:
- *   This interface can be used to sychronize the window client with the
+ *   This interface can be used to synchronize the window client with the
  *   NX server.  It really just implements an 'echo':  A synch message is
  *   sent from the window client to the server which then responds
  *   immediately by sending the NXEVENT_SYNCHED back to the windows client.
diff --git a/include/nuttx/power/battery_gauge.h b/include/nuttx/power/battery_gauge.h
index 23d42fb6e3..de76252415 100644
--- a/include/nuttx/power/battery_gauge.h
+++ b/include/nuttx/power/battery_gauge.h
@@ -172,7 +172,7 @@ int battery_gauge_register(FAR const char *devpath,
  *
  *   CONFIG_BATTERY_GAUGE - Upper half battery fuel gauge driver support
  *   CONFIG_I2C - I2C support
- *   CONFIG_BQ27426 - And the driver must be explictly selected.
+ *   CONFIG_BQ27426 - And the driver must be explicitly selected.
  *
  * Input Parameters:
  *   i2c - An instance of the I2C interface to use to communicate with the
diff --git a/include/nuttx/power/battery_monitor.h b/include/nuttx/power/battery_monitor.h
index fb808fdd65..c6f0e7c747 100644
--- a/include/nuttx/power/battery_monitor.h
+++ b/include/nuttx/power/battery_monitor.h
@@ -154,7 +154,7 @@ struct battery_monitor_voltage_s
    * Cell voltages are stored in microvolts (uV)
    * Cell voltages in this array should be ordered according to the
    * physical layout of cells in the system.  Driver should rearrange
-   * voltage values as necssary to present the user with a contiguous
+   * voltage values as necessary to present the user with a contiguous
    * list of cell voltages in the expected order.
    */
 
@@ -284,7 +284,7 @@ struct battery_monitor_operations_s
 
   int (*soc)(struct battery_monitor_dev_s *dev, b16_t *value);
 
-  /* Get the battery pack Couloumb count value */
+  /* Get the battery pack Coulomb count value */
 
   int (*coulombs)(struct battery_monitor_dev_s *dev, int *value);
 
@@ -389,7 +389,7 @@ int battery_monitor_register(FAR const char *devpath,
  *
  *   CONFIG_BATTERY_MONITOR - Upper half battery monitor driver support
  *   CONFIG_I2C - I2C support
- *   CONFIG_I2C_BQ769X0 - And the driver must be explictly selected.
+ *   CONFIG_I2C_BQ769X0 - And the driver must be explicitly selected.
  *
  * Input Parameters:
  *   i2c       - An instance of the I2C interface to use to communicate with
diff --git a/include/nuttx/sensors/dhtxx.h b/include/nuttx/sensors/dhtxx.h
index b60415080f..70fda0f5a9 100644
--- a/include/nuttx/sensors/dhtxx.h
+++ b/include/nuttx/sensors/dhtxx.h
@@ -68,7 +68,7 @@ struct dhtxx_config_s
 
 enum dhtxx_status_e
 {
-  /* Timeout accured waiting for data. */
+  /* Timeout occurred waiting for data. */
 
   DHTXX_TIMEOUT,
 
diff --git a/include/nuttx/sensors/sensor.h b/include/nuttx/sensors/sensor.h
index b5ffc0cbd4..8e9d0d97a6 100644
--- a/include/nuttx/sensors/sensor.h
+++ b/include/nuttx/sensors/sensor.h
@@ -167,7 +167,7 @@
 
 /* CO2
  * A sensor of this type returns the content of CO2 in the air
- * This vaule is in units (ppm-part per million).
+ * This value is in units (ppm-part per million).
  */
 
 #define SENSOR_TYPE_CO2                             18
@@ -345,7 +345,7 @@ struct sensor_event_gps     /* Type: Gps */
 struct sensor_event_uv      /* Type: Ultraviolet Light */
 {
   uint64_t timestamp;       /* Units is microseconds */
-  float uvi;                /* the vaule range is 0 - 15 */
+  float uvi;                /* the value range is 0 - 15 */
 };
 
 struct sensor_event_noise   /* Type: Noise Loudness */
diff --git a/include/nuttx/serial/uart_16550.h b/include/nuttx/serial/uart_16550.h
index ac102806a9..e091a2cb3b 100644
--- a/include/nuttx/serial/uart_16550.h
+++ b/include/nuttx/serial/uart_16550.h
@@ -321,7 +321,7 @@ typedef uint32_t uart_addrwidth_t;
  ****************************************************************************/
 
 /****************************************************************************
- * Public Functions Defintions
+ * Public Functions Definitions
  ****************************************************************************/
 
 /****************************************************************************
diff --git a/include/nuttx/usb/dfu.h b/include/nuttx/usb/dfu.h
index e7c0eb6e7f..f2647d2970 100644
--- a/include/nuttx/usb/dfu.h
+++ b/include/nuttx/usb/dfu.h
@@ -44,7 +44,7 @@
 #include <nuttx/usb/usbdev.h>
 
 /****************************************************************************
- * Public Functions Defintions
+ * Public Functions Definitions
  ****************************************************************************/
 
 #undef EXTERN
diff --git a/include/nuttx/video/vnc.h b/include/nuttx/video/vnc.h
index 7535864c2f..6761a07201 100644
--- a/include/nuttx/video/vnc.h
+++ b/include/nuttx/video/vnc.h
@@ -64,7 +64,7 @@ extern "C"
  * Description:
  *   Initialize the VNC frame buffer driver.  The VNC frame buffer driver
  *   supports two initialization interfaces:  The standard up_fbinitialize()
- *   that will be called from the graphics layer and this speical
+ *   that will be called from the graphics layer and this special
  *   initialization function that can be used only by VNC aware OS logic.
  *
  *   The two initialization functions may be called separated or together in
diff --git a/include/nuttx/wqueue.h b/include/nuttx/wqueue.h
index 41ed853735..ba96380e75 100644
--- a/include/nuttx/wqueue.h
+++ b/include/nuttx/wqueue.h
@@ -266,8 +266,8 @@ enum work_evtype_e
   WORK_UDP_WRITEBUFFER,    /* Notify that UDP write buffer is empty */
   WORK_NETLINK_RESPONSE,   /* Notify that Netlink response is available */
   WORK_CAN_READAHEAD,      /* Notify that CAN read-ahead data is available */
-  WORK_USB_MSC_CONNECT,    /* Notify that an USB MSC connect occured */
-  WORK_USB_MSC_DISCONNECT  /* Notify that an USB MSC connect occured */
+  WORK_USB_MSC_CONNECT,    /* Notify that an USB MSC connect occurred */
+  WORK_USB_MSC_DISCONNECT  /* Notify that an USB MSC connect occurred */
 };
 
 /* This structure describes one notification and is provided as input to
diff --git a/include/sys/mman.h b/include/sys/mman.h
index 67176974ae..8989c9220c 100644
--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@@ -63,7 +63,7 @@
 #define MAP_EXECUTABLE  (1 << 7)        /* Bit 7:  Mark it as an executable */
 #define MAP_LOCKED      (1 << 8)        /* Bit 8:  Lock pages mapped into memory */
 #define MAP_NORESERVE   (1 << 9)        /* Bit 9:  Do not reserve swap space for this mapping */
-#define MAP_POPULATE    (1 << 10)       /* Bit 10: opulate (prefault) page tables */
+#define MAP_POPULATE    (1 << 10)       /* Bit 10: populate (prefault) page tables */
 #define MAP_NONBLOCK    (1 << 11)       /* Bit 11: Do not block on IO */
 
 /* Failure return */
diff --git a/include/sys/stat.h b/include/sys/stat.h
index 3cb314061c..6b998184a4 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -103,7 +103,7 @@
 #define S_TYPEISMQ(buf)  S_ISMQ((buf)->st_mode)
 #define S_TYPEISSHM(buf) S_ISSHM((buf)->st_mode)
 
-/* The following macros are required by POSIX to acheive backward
+/* The following macros are required by POSIX to achieve backward
  * compatibility with earlier versions of struct stat.
  */