diff --git a/gui/main.cpp b/gui/main.cpp
index 29f74d3..81146ee 100644
--- a/gui/main.cpp
+++ b/gui/main.cpp
@@ -1,3 +1,10 @@
+/**
+ * @file main.cpp
+ * @brief Program entry point.
+ *
+ * Written by Clyne Sullivan.
+ */
+
 #include "wxapp.hpp"
 
 #include <wx/app.h>
diff --git a/gui/stmdsp.cpp b/gui/stmdsp.cpp
index 0621ba1..9119284 100644
--- a/gui/stmdsp.cpp
+++ b/gui/stmdsp.cpp
@@ -1,3 +1,14 @@
+/**
+ * @file stmdsp.cpp
+ * @brief Interface for communication with stmdsp device over serial.
+ *
+ * Copyright (C) 2021 Clyne Sullivan
+ *
+ * Distributed under the GNU GPL v3 or later. You should have received a copy of
+ * the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include "stmdsp.hpp"
 
 #include <serial/serial.h>
diff --git a/gui/stmdsp.hpp b/gui/stmdsp.hpp
index 9c60b85..5dda89c 100644
--- a/gui/stmdsp.hpp
+++ b/gui/stmdsp.hpp
@@ -1,3 +1,14 @@
+/**
+ * @file stmdsp.hpp
+ * @brief Interface for communication with stmdsp device over serial.
+ *
+ * Copyright (C) 2021 Clyne Sullivan
+ *
+ * Distributed under the GNU GPL v3 or later. You should have received a copy of
+ * the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #ifndef STMDSP_HPP_
 #define STMDSP_HPP_
 
diff --git a/gui/wxapp.hpp b/gui/wxapp.hpp
index 2133d6a..85bddc2 100644
--- a/gui/wxapp.hpp
+++ b/gui/wxapp.hpp
@@ -1,3 +1,14 @@
+/**
+ * @file wxapp.hpp
+ * @brief Main application object for the stmdsp gui.
+ *
+ * Copyright (C) 2021 Clyne Sullivan
+ *
+ * Distributed under the GNU GPL v3 or later. You should have received a copy of
+ * the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #ifndef WXAPP_HPP_
 #define WXAPP_HPP_
 
diff --git a/gui/wxmain.cpp b/gui/wxmain.cpp
index 0efab35..8f2e386 100644
--- a/gui/wxmain.cpp
+++ b/gui/wxmain.cpp
@@ -1,3 +1,14 @@
+/**
+ * @file wxmain.cpp
+ * @brief Main window definition.
+ *
+ * Copyright (C) 2021 Clyne Sullivan
+ *
+ * Distributed under the GNU GPL v3 or later. You should have received a copy of
+ * the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include "wxmain.hpp"
 
 #include <wx/combobox.h>
diff --git a/gui/wxmain.hpp b/gui/wxmain.hpp
index 4a73b2f..ec30f1f 100644
--- a/gui/wxmain.hpp
+++ b/gui/wxmain.hpp
@@ -1,3 +1,14 @@
+/**
+ * @file wxmain.hpp
+ * @brief Main window definition.
+ *
+ * Copyright (C) 2021 Clyne Sullivan
+ *
+ * Distributed under the GNU GPL v3 or later. You should have received a copy of
+ * the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #ifndef WXMAIN_HPP_
 #define WXMAIN_HPP_