Final answer:
Microsoft Word is the popular word processing program available with Windows, known for its advanced features such as variable width fonts and WYSIWYG capability.
Step-by-step explanation:
When it comes to word processing programs available with Windows, Microsoft Word is the correct answer. This program has evolved significantly over time from its early versions, which only allowed basic typesetting similar to a typewriter. As word processing software developed, features like variable width fonts, WYSIWYG editors (what you see is what you get), and the ability to print to high-resolution devices like laser and inkjet printers were introduced. These advancements have allowed users to create documents that mimic professional typesetting, although there are still many features unique to professional typesetting that word processors do not encompass.
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