diff --git a/presentation_powerpoint/meeting_1st/humanoid_robotics_working_group_reading_group_1st_meeting.pdf b/pdf/meeting_1st/humanoid_robotics_working_group_reading_group_1st_meeting.pdf
similarity index 100%
rename from presentation_powerpoint/meeting_1st/humanoid_robotics_working_group_reading_group_1st_meeting.pdf
rename to pdf/meeting_1st/humanoid_robotics_working_group_reading_group_1st_meeting.pdf
diff --git a/presentation_powerpoint/meeting_2nd/humanoid_robotics_working_group_reading_group_2nd_meeting.pdf b/pdf/meeting_2nd/humanoid_robotics_working_group_reading_group_2nd_meeting.pdf
similarity index 100%
rename from presentation_powerpoint/meeting_2nd/humanoid_robotics_working_group_reading_group_2nd_meeting.pdf
rename to pdf/meeting_2nd/humanoid_robotics_working_group_reading_group_2nd_meeting.pdf
diff --git a/presentation_powerpoint/meeting_3rd/humanoid_robotics_working_group_reading_group_3rd_meeting.pdf b/pdf/meeting_3rd/humanoid_robotics_working_group_reading_group_3rd_meeting.pdf
similarity index 100%
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diff --git a/presentation_powerpoint/meeting_4th/humanoid_robotics_working_group_reading_group_4th_meeting.pdf b/pdf/meeting_4th/humanoid_robotics_working_group_reading_group_4th_meeting.pdf
similarity index 100%
rename from presentation_powerpoint/meeting_4th/humanoid_robotics_working_group_reading_group_4th_meeting.pdf
rename to pdf/meeting_4th/humanoid_robotics_working_group_reading_group_4th_meeting.pdf