会议室的预定，可避免时间地点的冲突，在这个简单的会议室管理系统中可以实现会议室使用的高效与有序-Meeting room reservation, can avoid the conflict of time and place, in this simple meeting room management system can realize the efficient and orderly use of conference room

实现图书馆信息管理系统的增加，删除，修改，查询，预定，退订等功能。-Increase in library information management system, delete, modify, query, reservations, unsubscribe function.