diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..00b7cc7
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,8 @@
+The MIT License (MIT)
+Copyright (c) 2016 takayun
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..1f223d4
--- /dev/null
+++ b/README.md
@@ -0,0 +1,25 @@
+# Assembly Emulator
+## Summary
+This software is emulate assembly program.
+***
+## Assembly Instrument
+- add/addi
+- sub
+- jal/jar/jr
+- mult
+- slt/slti
+- seq/sge/sgt/sle/sne
+- j/jal/jalr/jr
+- beq/bne
+- lt/sw
+***
+## Pseudo Instrument (interrupt-mode)
+You must input ':' as to input command.
+#### :help
+- Display help.
+
+#### :quit
+- Quit interrupt.
+***
+## License
+This software license is MIT.
diff --git a/emul_repl.c b/emul_repl.c
index 34f896d..bcf0435 100644
--- a/emul_repl.c
+++ b/emul_repl.c
@@ -53,7 +53,7 @@
     move(1, (x-strlen(help_title))/2);
     printw("%s\n\n", help_title);
     printw("Summary:\n\n");
-    printw(" This program is Asembly Emulator to based on MIPS.\n\n");
+    printw(" This program is Asembly Emulator.\n\n");
     printw("Command to this Emulator REPL:\n\n");
     printw(" You need to put ':' for swich command mode.\n\n");
     printw("    :help    Display help\n");