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21世纪是知识经济的时代，组织和利用知识信息的有力武器――数据库将继续得到广泛应用。数据库(Database，即DB)是存储在一起的相关数据的集合，是存储数据的“仓库”。其名词源于20世纪50年代，美国为战争的需要，把各种情报案中在一起，存入计算机。60年代数据库帮助设计了阿波罗登月火箭，推动了数据库技术的产生。70年代，数据库蓬勃发展，网状系统和层次系统占领了市场，并且关系数据库理论也日趋完善。80年代起，关系数据库产品已相当成熟，后来有了分布式数据库系统(Distributed Database Systems)、数据库机(Datsbase Machines)、知识库(Knowledge Base)系统相知识机。现在，数据库技术已成为计算机领域最重要的技术之一，它是软件学科中一个独立分支(即研究数据库的结构、存储、设计和使用的一门软件学科)。-The 21st century is the era of knowledge-based economy, organization and use of knowledge and information of a powerful weapon- the database will continue to be widely applied. Database (Database, or DB) is stored together a collection of related data is stored data "warehouse." The term originated from the 20th century, 50 s, the United States for the war needs, the case of the various information together into a computer. 60 s database to help design the Apollo moon rocket to promote the generation of database technology. 70 years, vigorous development of the database, network systems, and levels of the system o

用户界面是指人与机器之间交互作用的工具和方法。如键盘、鼠标、跟踪球、话筒都可成为与计算机交换信息的接口。-The user interface is the interaction between man and machine tools and methods. Such as keyboard, mouse, track ball, microphone and computer can become the interface to exchange information.

很好的药店进销存系统-good pharmacy Invoicing System

20060613am--Windows嵌入式开发系列课程(6)：启动程序BootLoader的分析.pdf 学习ＷinCE必看。-20060613am- Windows Embedded Development Series courses (6): start a program BootLoader analysis. Pdf learning WinCE see.

This the compiled java norms, these norms of a good programmer is very often used-This is the compiled java norms, these norms of a good programmer is very often used

IBM关于软件工程的介绍，主要关于质量保证-software works on IBM"s briefing, mainly on quality assurance

本书主要介绍了成功、有效地进行软件测试的实用策略和技术-This book focuses on successful and effective software testing and practical strategies and techniques

自己在lm3s1138上面移植的128*64程序，也有51的程序，还有128*64的中文说明书，相信会对大家有用的。-Their transplants at lm3s1138 above 128* 64 procedures, 51 there is also the procedures, 128* 64 have English instructions, the trust will be useful to everyone.

应用背景本程序是脉冲宽度调制，并用于直流-直流降压转换器，过程全部是的，每个人都参加了调试工具箱程序正确地。它是由dsPIC30F4011关键技术本程序用于直流-直流converter.it产生dsPIC30F4011。

学生系统，可以输入学号、姓名、地址、电话等，可以查询、可以保存-Students in the system, you can enter the Student ID, name, address, telephone and so on, you can query, you can save