人类社会经过农业时代，工业时代，最终进入到了信息时代。就好象蒸汽机（机械）是工业时代的根本一样，什么东西是信息时代运作的基础？你一定知道，因为这东西就三个字：互联网。
不管你手上的电子设备是电脑还是平板，抑或是手机，只要是电子设备，脱离了互联网运作就无法获取信息。也因此，现在的IT及互联网行业异常发达，对Internet与日俱增的需求也让我们接触到了各种互联网专业术语。
不过，这些互联网术语大多以缩写的方式呈现，不信你随便打开一个网页，就可能在地址一览看到这样的信息：
http://www.xxx.com/html
或许正因为它们太熟悉，所以你几乎没去想过http什么意思，www是什么的缩写，为什么域名是com，最后的html又代表了什么。
如果你的工作内容涉及到互联网，或者正好是IT行业的从业人员，那么你就有必要搞清楚这些单词缩写的全称及其含义。不然别人在工作场合用这些词高谈阔论，你却一头雾水，不是显得特别尴尬吗？
让我们一起来看看20个互联网常见英文缩写的解释吧。
ADSL Asymmetric Digital Subscriber Line, a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voice-band modem can provide. WWW World Wide Web, a distributed hypertext system invented by Tim Berners-Lee on a NeXT Computer. Currently, one of the most popular services offered on the Internet. Web pages are viewed using browsing software like Netscape Navigator, Sun Microsystems Hot Java, or Microsoft Internet Explorer. See also browser, Hypertext Markup Language, net surfing, and triple-dub. WiFi Wireless Fidelity. Popular term for a form of wireless internet. URL Uniform Resource Locator. An address on the internet. HTTP Hypertext Transfer Protocol, the protocol used by the World Wide Web to transfer HTML files. FTP File Transfer Protocol COM Com is derived from the word commercial, indicating its original intended purpose for domains registered by commercial organizations. HTML Hypertext Markup Language, the tag-based ASCII language used to create pages on the World Wide Web. See also hypertext. IRC Internet Relay Chat, a chat network that operates over the Internet. Originally evolved from the UNIX talk program, IRC is similar to the chat systems found on commercial online services. DNS Domain Name System, a database system which looks up host IP addresses based upon domain names. For example if you ask for "www.thisismyhost.com" it will return 123.45.67.89. Copies of the Domain Name System are distributed through the Internet.
ISP Internet Service Provider, a business that delivers access to the Internet, usually for a monthly fee. PSI, UUNET, and Netcom are examples of established ISPs but there are thousands of smaller ones all around the world. Any business that provides Internet services such as web sites or web site development. PHP programming language used for creating software that is part of a web site. LAN Local Area Network, a group of computers at a single location (usually an office or home) that are connected by phone lines or coaxial cable.
ISDN Integrated Services Digital Network, a technology offered by telephone carriers that allows for the rapid transfer of voice and data. RAM Random Access Memory, the working memory of the computer into which application programs can be loaded and executed. It helps to have more of this "working space" installed when running advanced operating systems and applications. RSS Rich Site Summary, used for sharing content, such as, news articles. SEO Search Engine Optimization CPA Cost per action CPC Cost per click CTR
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