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To echo part of captcrisis's sentiment, I too greatly enjoyed WordPerfect 5.1 for DOS. There is much to be said for sweeping aside all the distractions of a GUI, including graphical fonts. Of course, WP5.1 was downright hellish as soon as you started trying to position graphics or create complicated layouts, but the simple stuff still worked great.
Considerable information on how to get WP5.1 (and WP6.x) working on modern systems can be found by clicking my sig.