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A word processor is an electronic device or computer software application, that performs the task of composition, editing, formatting, and sometimes printing of documents. The word processor was a stand-alone office machine in the 1960s, combining the keyboard text-entry and printing functions of an electric typewriter, with a recording unit, either tape or floppy disk (as used by the Wang machine) with a simple dedicated computer processor for the editing of text.〔("TECHNOWRITERS" ) ''Popular Mechanics'', June 1989, pp. 71-73.〕 Although features and designs varied among manufacturers and models, and new features were added as technology advanced, word processors typically featured a monochrome display and the ability to save documents on memory cards or diskettes. Later models introduced innovations such as spell-checking programs, and improved formatting options. As the more versatile combination of personal computers and printers became commonplace, and computer software applications for word processing became popular, most business machine companies stopped manufacturing dedicated word processor machines. As of 2009 there were only two U.S. companies, Classic and AlphaSmart, which still made them.〔Mark Newhall, ''Farm Show''〕 Many older machines, however, remain in use. Since 2009, Sentinel has offered a machine described as a "word processor", but it is more accurately a highly specialised microcomputer used for accounting and publishing.〔StarLux Illumination catalog〕 Word processing was one of the earliest applications for the personal computer in office productivity and was the most popular application on home and personal computers until the World Wide Web rose to prominence in the mid-1990s. Although the early word processors evolved to use tag-based markup for document formatting, most modern word processors take advantage of a graphical user interface providing some form of what-you-see-is-what-you-get ("WYSIWYG") editing. Most are powerful systems consisting of one or more programs that can produce any arbitrary combination of images, graphics and text, the latter handled with type-setting capability. Typical features of a modern word processor include font application, spell checking, grammar checking, a built-in thesaurus, automatic text correction, Web integration, and HTML exporting, among others. In its simplest form, a word processor is little more than a large Expensive Typewriter-like machine that makes correcting mistakes possible before printing. Microsoft Word is the most widely used word processing software according to a user tracking system built into the software. Microsoft estimates that roughly half a billion people use the Microsoft Office suite, which includes Word. Many other word processing applications exist, including WordPerfect (which dominated the market from the mid-1980s to early-1990s on computers running Microsoft's MS-DOS operating system, and still (2014) is favored for legal applications) and open source applications OpenOffice.org Writer, LibreOffice Writer, AbiWord, KWord, and LyX. Web-based word processors, such as Office Web Apps or Google Docs, are a relatively new category. ==Characteristics== Word processors evolved dramatically once they became software programs rather than dedicated machines. They can usefully be distinguished from text editors, the category of software they evolved from. Text editors offer facilities for typing, storing, replaying, and usually printing text (strings of characters). Text editors do not format lines or documents; in fact they lack those concepts. (There are extensions of text editors which perform format lines and pages: batch document processing systems, starting with TJ-2 and RUNOFF and still available in such systems as LaTeX, as well as programs that implement the paged-media extensions to HTML and CSS). Text editors are now used mainly by programmers, website designers, computer system administrators, and, in the case of LaTeX, by mathematicians and scientists (for complex formulas and for citations in rare languages). They are also useful when fast startup times, small file sizes, editing speed, and simplicity of operation are valued, and when formatting is unimportant. Due to their use in managing complex software projects, text editors can sometimes provide better facilities for managing large writing projects than a word processor. Word processing added to the text editor the ability to control type style and size, to manage lines (word wrap), to format documents into pages, and to number pages. Functions now taken for granted were added incrementally, sometimes by purchase of independent providers of add-on programs. Spell checking, grammar checking and mail merge were some of the most popular add-ons for early word processors. Word processors are also capable of hyphenation, and the management and correct positioning of footnotes and endnotes. More advanced features found in recent word processors include: * Collaborative editing, allowing multiple users to work on the same document. * Indexing assistance. (True indexing, as performed by a professional human indexer, is far beyond current technology, for the same reasons that fully automated, literary-quality machine translation is.) * Creation of tables of contents. * Management, editing, and positioning of visual material (illustrations, diagrams), and sometimes sound files. * Automatically managed (updated) cross-references to pages or notes. * Version control of a document, permitting reconstruction of its evolution. * Non-printing comments and annotations. * Generation of document statistics (characters, words, readability level, time spent editing by each user). * "Styles", which automate consistent formatting of text body, titles, subtitles, highlighted text, and so on. Later desktop publishing programs were specifically designed to allow elaborate layout for publication, but often offered only limited support for editing. Typically, desktop publishing programs allow users to import text that was written using a text editor or word processor. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Word processor」の詳細全文を読む スポンサード リンク
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