Read story here.
The ending quote is a bit chilling on what anti-competitive behavior can do to products.
It's sometimes alleged that WordPerfect lost its share because of poor software rather than anti-competitive tactics - as if the two are mutually exclusive. The WordPerfect Corporation dominated the DOS word processing market but had botched the 1991 introduction of a Windows version with a product that was widely regarded as shoddy. But by 1995, it had licked it into shape. In truth we'll never know whether WordPerfect and Quattro could have succeeded on their merits in the marketplace: because Microsoft never allowed Novell a clean fight.