Word processing is a program that allows users to type, edit, and print documents. It has replaced typewriters. Word processing can be used for business, education, and personal documents. It offers advantages like faster editing, font formatting, printing multiple copies, and adding images. Newer versions of word processing programs include features like spell check, grammar check, templates, mail merge, and WYSIWYG display. The interface of word processing programs has evolved over time from menus and toolbars to the modern ribbon system seen in Microsoft Word 2007 and later.