Abarrier along the open sides of stairways and platforms that prevent falling.

Board game basics: the main types of board games. as a general rule, board games can be divided into three categories: war games, game design is the art of applying design and aesthetics to create a game for game design creates goals, rules and challenges to define a board game, list of types of games 

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Answer(d) readers name,your name,the date,the subject,and the body of the memo;