好用的音视频播放器，可以看bilibili缓存文件.m4s播放器

计算机科学与数学，郭百宁

老机器可用，文件小巧，易于安装，是初学者非常好用的软件。

[30天自制操作系统].(川合秀实).周自恒等.扫描版

计算机网络第五版，高清，占内存极小，推荐使用！

网络工程师第三版 高清晰 由雷震甲主编 考试用书

作者: John Sharp 日期: 12/19/2007 ISBN: 9780735624306 页数: 704 出版社: Microsoft Your hands-on, step-by-step guide to learning how to build applications with Visual C#. Get the hands-on, step-by-step guide to learning the latest enhancements in Microsoft Visual C# 2008. Visual C#, one of the tools in Microsoft Visual Studio® 2008, is a modern programming language designed to deliver a productive environment for creating business frameworks and reusable object-oriented components. Whether you’re a beginning programmer or new to the Visual C# programming language, you’ll learn how to use the fundamental features of Visual Studio 2008 and gain a basic understanding of the latest enhancement of the Visual C# language. You’ll work at your own pace through hands-on, learn-by-doing exercises, get started creating components and working Windows® applications, and build your knowledge as you start creating your first Visual C#–based applications. You’ll also explore how to create data management and Web-based applications. In each chapter, work through learn-by-doing exercises that demonstrate how, when, and why to use the many features of the Visual C# rapid application development environment. Includes a companion CD with code samples, data sets, and a fully searchable eBook.