Convenient alphabetic abbreviations, called mnemonics, and other symbols represent operation codes, storage locations, and data elements.
便捷的字母缩写，所谓的记忆法，以及其他符号所代表的运作守则，存放位置，及数据元素。
2
To compact data by combining parts of the data, for example, to transform a two-word alphabetic key into a one-word numeric key by adding the numeric equivalents of the letters.