classes:  lecturer. Machine room should be concerned because many broken machines make many of you do not have laptops difficult to practice.  curriculum. Machine room should be concerned because many broken machines make many of you do not have laptops difficult to practice.  facility. Machine room should be concerned because many broken machines make many of you do not have laptops difficult to practice.  general. Machine room should be concerned because many broken machines make many of you do not have laptops difficult to practice.