OIC ITCreate Club 第一 Advent Calendar 2017 - Adventar
2017(第一): https://adventar.org/calendars/2563 2017(第二): https://adventar.org/calendars/2640 2016: https://adventar.org/calendars/1484 2015: https://adventar.org/calendars/1034 2014: https://adventar.org/calendars/638