该通讯录是自己练习时所编写，采用c#实现，以文本文件存取通讯录记录，并实现了记录的浏览，添加，修改，删除，音乐播放等功能-The Address Book is prepared by their own practice, the use of c# Achieve in order to access the Address Book text file records and achieved a record to view, add, modify, delete, music pla

Java设计的简易计算器源代码，基本实现四则运算和退格、清零功能。-A simple calculator designed Java source code, basically four operations and backspace, resetting function.

串口通信,可实现双向传递，功能强大，无可挑剔-COM