索书单的用途是便于图书馆为读者寻找图书。它既可方便读者,也可方便图书管理员。但在实际使用中往往存在一些问题:一是索书单利用率很差,浪费严重;二是读者轻易乱填,耗费管理员精力。三是索书单到处乱丢,很不卫生。实行由读者购买索书单后,上述情况就发生了很大变化,一是索书单使用量明显下降,减少了浪费。二是读者填写认真,增强了借书的针对性,减少了图书管理员的无效劳动。三是索书单乱丢乱放的现象几乎不存在了,环境也卫生了。索书单不仅有如此多的好处,而且也还很便宜,读者仅花一分钱,就可以购买几张索书单, The purpose of the call list is to make it easier for the library to find books for its readers. It is convenient for both readers and librarians. However, in actual use, there are often some problems: First, the availability of cable book is poor, serious waste; Second, readers easily chaos filling, consume administrator energy. Third, there is a litter of litters everywhere, so it is not hygienic. The implementation of the reader to buy a single cable after the above conditions have undergone great changes, first, significantly reduced the amount of cable claims, reducing waste. Second, the reader to fill seriously, and enhance the relevance of borrowing books, reducing librarian invalid work. Third, the phenomenon of cable book littering almost no place, the environment is also hygienic. Callsheets not only have so many benefits, but also still very cheap, readers only spend a penny, you can buy a few cable lists,