19世纪三十年代，英国的库克和惠斯通开发了电报系统。该系统有五个磁针，通电后，可以指出一组字母和数字。
In the 1830s, the British team of Cooke and Wheatstone developed a telegraph system with five magnetic needles that could be pointed around a panel of letters and Numbers by using an electric current.
按照美国电报电话公司的新政策，使用数字用户线路（DSL）接连互联网的客户将受到限制，即每个月的下载量限制为150G。
Under AT&T’s new policy, customers using digital subscriber line (DSL) connections to the internet will have a monthly download limit of 150 gigabytes.
20世纪晚期，在发达国家中，电报的大部分应用已被用计算机技术的数字数据传输系统取代。
By the late 20th century the telegraph had been replaced in most applications in developed countries by digital data transmission systems Based on computer technology.
后来的电报机能自动解译字母和数字。
Later versions of the telegraph could decipher letters and Numbers automatically.
1832年摩斯为电报系统勾画出了轮廓，1835年他研制出一套代表字母和数字的代码(摩斯密码)。
In 1832 Samuel F. B. Morse made sketches of ideas for a system of electric telegraphy, and in 1835 he developed a code to represent letters and Numbers (Morse code).
1832年摩斯为电报系统勾画出了轮廓，1835年他研制出一套代表字母和数字的代码(摩斯密码)。
In 1832 Samuel F. B. Morse made sketches of ideas for a system of electric telegraphy, and in 1835 he developed a code to represent letters and Numbers (Morse code).
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