Protel learning tutorials, very helpful for beginners

印制电路工艺制程电子图书 讲各种工艺的特点、优缺点 很不错-PCB making technology

Ｃ语言是一种结构化语言。它层次清晰，便于按模块化方式组织程序，易于调试和维护。Ｃ语言的表现能力和处理能力极强。它不仅具有丰富的运算符和数据类型-C language is a structured language. Its level of clear, easy to organize procedures in accordance with modular, easy to debug and maintain. C language and ability to deal with the performance ability. It not only has a wealth of data types and operators…………

Let us try to understand simulation of a typical Orthogonal Frequency Division Multiplexing (OFDM) transmission defined per IEEE 802.11a specification.

设计模式之Visitor，设计模式之Visitor-Design Patterns of Visitor, the Visitor Design Pattern

介绍了在在公司、企业等工作当中应该注意的一些礼仪知识-introduced in the companies, enterprises and other work which should be paid attention to some etiquette knowledge

GNU开发手册，使用GDB进行Linux程序调适的方法介绍！！！值得一看的手册-the development of GDB

PIC16F87X系列的中文资料，包括PIC16F877,及MAPLIB IDE的中问使用说明-include chinese discription of pic16f87x

Perl-5中文教程,Perl对于许多人来说可能不是很了解，现在也不流行，但学习它对编程的结构和思想是很有帮助的。-Perl-5 Chinese guides, Perl for many people may not know, nor popular, but its programming study of the structure and ideology is very helpful.

linux程序设计第四版，是一本不错的学习linux的好书-linux programming fourth edition, is a good book to learn linux

An Introduction to Mathematica