Ottawa (Canada) - Now on its thirteenth edition, the brand of word processor that at one time commanded an industry, today must humbly find its way in a market long ago seized by Microsoft. WordPerfect - a topic about which many pages of computer magazines have been expended, and I wrote a book - bears very little resemblance today to the highly respected, if somewhat overrated, document processor of the 1980s. No, right out of the box, what it resembles - in large measure - is today"s Microsoft Word. And Corel, the product"s current manufacturer, has no problem with that at all.