企鹅信息技术词典

作者简介

《企鹅信息技术词典(英文版)》是为了使读者系统、全面地了解信息技术知识而编写的，它释义清晰、准确、内容涉及从个人电脑的硅片到国际电子通讯网络的在型主机系统，涵盖了工业标准、缩略语、程序设计专用语、终端用户系统及重大革新技术。

编辑推荐

《企鹅信息技术词典(英文版)》还收录了近年来信息技术领域涌现出来的多媒体、目标倾向和电子通讯开发等新概念。此书既面向计算机专业人员又适合于广大计算机爱好者。

内容概要

作者：（英国）托尼•冈顿（Tony Gunton）

章节摘录

版权页：   插图：   digital circuit A transmission line that carries information in digital form,in other words as a series of coded electrical pulses.Digital information,such as a coded textmessage,can be carried on a digital circuit as it is.without the conversion by means of modems that is necessary to carry digital information over analog channels Telephonecouversations can also be carried on digital circuits.To do so,the analog voice signal isconverted to digital form by sampling it at inrervals,and convening the frequency foundinto a digital code-see pulse code modulation. digital computer A roachine that can accepta series of instructions(a program),and canthen interpret these instructions while accepting and processing data,in order to generatenew informadon or to control another machine or process.Both the program and the dataare represented in digital form,as codes or numbers,and this distinguishes digital fromanalog computers,which operate on physical values such as voltages or movements.

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