diff --git a/array/sc_array.h b/array/sc_array.h
index 22ff14b..cefca91 100644
--- a/array/sc_array.h
+++ b/array/sc_array.h
@@ -70,7 +70,7 @@
 	} while (0)
 
 /**
- * Term array
+ * Destroy array
  * @param a array
  */
 #define sc_array_term(a)                                                       \
diff --git a/condition/sc_cond.h b/condition/sc_cond.h
index dabe2c1..b3b5810 100644
--- a/condition/sc_cond.h
+++ b/condition/sc_cond.h
@@ -57,12 +57,16 @@ struct sc_cond {
 };
 
 /**
+ * Init cond object
+ *
  * @param c cond
  * @return     '0' on success, negative on error, errno will be set.
  */
 int sc_cond_init(struct sc_cond *c);
 
 /**
+ * Destroy cond object
+ *
  * @param c cond
  * @return     '0' on success, negative on error, errno will be set.
  */
diff --git a/map/README.md b/map/README.md
index c1e1977..1e6b6f0 100644
--- a/map/README.md
+++ b/map/README.md
@@ -28,6 +28,8 @@ sc_map_dec_strkey(s64, const char *, uint64_t)
 sc_map_dec_strkey(sll, const char *, long long)
 ```
 
+If you need more types, you can add at the end of sc_map.h and sc_map.c
+
 - This is a very fast hashmap.
     - Single array allocation for all data.
     - Linear probing over an array.
diff --git a/memory-map/sc_mmap.h b/memory-map/sc_mmap.h
index 65ea213..b882bdd 100644
--- a/memory-map/sc_mmap.h
+++ b/memory-map/sc_mmap.h
@@ -86,12 +86,16 @@ struct sc_mmap {
 int sc_mmap_init(struct sc_mmap *m, const char *name, int file_flags, int prot,
 		 int map_flags, size_t offset, size_t len);
 /**
+ * Destroy mmap instance.
+ *
  * @param m mmap
  * @return       '0' on success, '-1' on error, call sc_mmap_err() for details.
  */
 int sc_mmap_term(struct sc_mmap *m);
 
 /**
+ * Sync mmap to the disk.
+ *
  * @param m      mmap
  * @param offset offset
  * @param len    len
diff --git a/queue/sc_queue.h b/queue/sc_queue.h
index 3021435..fa50512 100644
--- a/queue/sc_queue.h
+++ b/queue/sc_queue.h
@@ -111,7 +111,7 @@
 	} while (0)
 
 /**
- *   Term queue
+ *   Destroy queue
  *   @param q queue
  */
 #define sc_queue_term(q)                                                       \
diff --git a/thread/sc_thread.h b/thread/sc_thread.h
index eb82b60..65e549b 100644
--- a/thread/sc_thread.h
+++ b/thread/sc_thread.h
@@ -58,11 +58,15 @@ struct sc_thread {
 #endif
 
 /**
+ * Init thread.
+ *
  * @param t thread
  */
 void sc_thread_init(struct sc_thread *t);
 
 /**
+ * Destroy thread.
+ *
  * @param t thread
  * @return  '0' on success,
  *          '-1' on error, call 'sc_thread_err()' for error string.
@@ -70,19 +74,26 @@ void sc_thread_init(struct sc_thread *t);
 int sc_thread_term(struct sc_thread *t);
 
 /**
+ * Get last error string.
+ *
  * @param t thread
  * @return  last error message
  */
 const char *sc_thread_err(struct sc_thread *t);
 
 /**
+ * Start thread.
+ *
  * @param t thread
+ * @param fn thread function
  * @return  '0' on success,
  *          '-1' on error, call 'sc_thread_err()' for error string.
  */
 int sc_thread_start(struct sc_thread *t, void *(*fn)(void *), void *arg);
 
 /**
+ * Wait until thread joins.
+ *
  * @param t thread
  * @return  '0' on success,
  *          '-1' on error, call 'sc_thread_err()' for error string.