Direction finding is an important component of Electronic Warfare (EW) system. The direction finding precision may directly affect signal sorting, identification, location and jamming decision etc.

测向是电子战系统的一个重要组成部分，测向精度直接对信号分选、识别、定位、干扰决策等都产生较大的影响。

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METHODS: Based on the military hospital information system, a system that can provide electronic drug directions was developed by establishing the database, collecting and sorting drug directions.

方法：基于“军字一号”医院信息系统，通过数据库的建立、药品说明书等信息的收集和整理，开发得到药品电子说明书数据库系统。

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System of postal-zone codes (zip stands for "zone improvement plan") introduced in the U. S. in 1963 to improve mail delivery and exploit electronic reading and sorting capabilities.

1963年美国为了便于邮件的分拣和投递而采用的邮政编号制。

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