pdf是一种阅读器的安装程序， PDF（Portable Document Format）文件格式是Adobe公司开发的电子文件格式。这种文件格式与操作系统平台无关，也就是说，PDF文件不管是在Windows，Unix还是在苹果公司的Mac OS操作系统中都是通用的。这一特点使它成为在Internet上进行电子文档发行和数字化信息传播的理想文档格式。越来越多的电子图书、产品说明、公司文告、网络资料、电子邮件开始使用PDF格式文件。PDF格式文件目前已成为数字化信息事实上的一个工业标准-pdf is a reader of the installation process, PDF (Portable Document Format) file format is Adobe has developed an electronic file format. This file format has nothing to do with the operating system platform, that is to say, PDF files, whether in Windows, Unix or Apple s Mac OS operating system are common. This feature makes it in the Internet on the conduct of electronic document distribution and dissemination of digital information the ideal document format. An increasing number of e-books, product descr iptions, the company statement, the network information, e-mail to start using PDF format. PDF format has become the digital information of a de facto industry standard