noun
BrE计算速查手册；简便计算表 a book or page that shows common calculations with their results, so that answers can be found quickly
数据来源：WordNet
Indeed , it would require a book only the size of a ready reckoner for all the alphabets to be written out .
实际上，用一个密码手册也完全可以把这些规则全部写下来。
ready reckonerready reckonerready reckoner