diff --git a/piclib/picrin/user.scm b/piclib/picrin/user.scm
index 5121ddc3..fd1190ff 100644
--- a/piclib/picrin/user.scm
+++ b/piclib/picrin/user.scm
@@ -13,4 +13,5 @@
           (scheme time)
           (picrin macro)
           (picrin dictionary)
-          (picrin array)))
+          (picrin array)
+          (picrin library)))
diff --git a/src/init.c b/src/init.c
index c1b573db..48601882 100644
--- a/src/init.c
+++ b/src/init.c
@@ -10,6 +10,34 @@
 #include "picrin/macro.h"
 #include "picrin/error.h"
 
+static pic_value
+pic_features(pic_state *pic)
+{
+  pic_value features = pic_nil_value();
+
+  pic_get_args(pic, "");
+
+  pic_push(pic, pic_sym_value(pic_intern_cstr(pic, "r7rs")), features);
+  pic_push(pic, pic_sym_value(pic_intern_cstr(pic, "ieee-float")), features);
+  pic_push(pic, pic_sym_value(pic_intern_cstr(pic, "picrin")), features);
+
+  return features;
+}
+
+static pic_value
+pic_libraries(pic_state *pic)
+{
+  pic_value libs = pic_nil_value(), lib;
+
+  pic_get_args(pic, "");
+
+  pic_for_each (lib, pic->libs) {
+    libs = pic_cons(pic, pic_car(pic, lib), libs);
+  }
+
+  return libs;
+}
+
 void pic_init_bool(pic_state *);
 void pic_init_pair(pic_state *);
 void pic_init_port(pic_state *);
@@ -38,23 +66,6 @@ void pic_init_contrib(pic_state *);
 
 void pic_load_piclib(pic_state *);
 
-#define push_sym(pic, name, list)                                       \
-  pic_push(pic, pic_symbol_value(pic_intern_cstr(pic, name)), list)
-
-static pic_value
-pic_features(pic_state *pic)
-{
-  pic_value features = pic_nil_value();
-
-  pic_get_args(pic, "");
-
-  push_sym(pic, "r7rs", features);
-  push_sym(pic, "ieee-float", features);
-  push_sym(pic, "picrin", features);
-
-  return features;
-}
-
 #define DONE pic_gc_arena_restore(pic, ai);
 
 void
@@ -72,7 +83,13 @@ pic_init_core(pic_state *pic)
     pic_define_syntactic_keyword(pic, pic->lib->env, pic->sDEFINE_SYNTAX, pic->rDEFINE_SYNTAX);
   }
 
+  pic_deflibrary (pic, "(picrin library)") {
+    pic_defun(pic, "libraries", pic_libraries);
+  }
+
   pic_deflibrary (pic, "(scheme base)") {
+    pic_defun(pic, "features", pic_features);
+
     pic_init_bool(pic); DONE;
     pic_init_pair(pic); DONE;
     pic_init_port(pic); DONE;
@@ -99,10 +116,6 @@ pic_init_core(pic_state *pic)
     pic_init_lib(pic); DONE;
 
     pic_load_piclib(pic); DONE;
-
     pic_init_contrib(pic); DONE;
-
-    pic_defun(pic, "features", pic_features);
-
   }
 }