diff --git a/arch/risc-v/common/include/tos_cpu_def.h b/arch/risc-v/common/include/tos_cpu_def.h
index c603da9b..30a20480 100644
--- a/arch/risc-v/common/include/tos_cpu_def.h
+++ b/arch/risc-v/common/include/tos_cpu_def.h
@@ -1,10 +1,3 @@
-/*
- * tos_cpu_def.h
- *
- *  Created on: Sep 7, 2019
- *      Author: ace
- */
-
 #ifndef _TOS_CPU_DEF_H_
 #define _TOS_CPU_DEF_H_
 
diff --git a/arch/risc-v/common/include/tos_cpu_types.h b/arch/risc-v/common/include/tos_cpu_types.h
index a3f9285d..f3ad3fbf 100644
--- a/arch/risc-v/common/include/tos_cpu_types.h
+++ b/arch/risc-v/common/include/tos_cpu_types.h
@@ -1,10 +1,3 @@
-/*
- * tos_cpu_types.h
- *
- *  Created on: Sep 7, 2019
- *      Author: ace
- */
-
 #ifndef _TOS_CPU_TYPES_H_
 #define _TOS_CPU_TYPES_H_
 
diff --git a/arch/risc-v/common/tos_cpu.c b/arch/risc-v/common/tos_cpu.c
index ec7a7ebf..8bf2d5ec 100644
--- a/arch/risc-v/common/tos_cpu.c
+++ b/arch/risc-v/common/tos_cpu.c
@@ -1,9 +1,3 @@
-/*
- * tos_cpu.c
- *
- *  Created on: Sep 8, 2019
- *      Author: ace
- */
 #include <tos.h>
 #include <riscv_encoding.h>
 
diff --git a/arch/risc-v/rv32i/gcc/port_c.c b/arch/risc-v/rv32i/gcc/port_c.c
index fcb9958d..d110ff29 100644
--- a/arch/risc-v/rv32i/gcc/port_c.c
+++ b/arch/risc-v/rv32i/gcc/port_c.c
@@ -1,9 +1,3 @@
-/*
- * port_c.c
- *
- *  Created on: Sep 9, 2019
- *      Author: ace
- */
 #include "riscv_encoding.h"
 #include <tos.h>
 
diff --git a/board/QEMU_Spike/Src/main.c b/board/QEMU_Spike/Src/main.c
index 406c6e84..7b729403 100644
--- a/board/QEMU_Spike/Src/main.c
+++ b/board/QEMU_Spike/Src/main.c
@@ -1,10 +1,3 @@
-/*
- * main.c
- *
- *  Created on: Sep 13, 2019
- *      Author: ace
- */
-
 #include "tos.h"
 
 #define TASK_SIZE 512
diff --git a/board/QEMU_Spike/TOS-CONFIG/tos_config.h b/board/QEMU_Spike/TOS-CONFIG/tos_config.h
index 501ec378..149d0915 100644
--- a/board/QEMU_Spike/TOS-CONFIG/tos_config.h
+++ b/board/QEMU_Spike/TOS-CONFIG/tos_config.h
@@ -1,10 +1,3 @@
-/*
- * tos_config.h
- *
- *  Created on: Sep 7, 2019
- *      Author: ace
- */
-
 #ifndef INC_TOS_CONFIG_H_
 #define INC_TOS_CONFIG_H_