An overlooked court case in Seattle has helped restore the reputation of the late computer pioneer Gary Kildall. Last week, a Judge dismissed a defamation law suit brought by Tim Paterson, who sold a computer operating system to Microsoft in 1980, against journalist and author Sir Harold Evans and his publisher Little Brown. The software became the basis of Microsoft's MS-DOS monopoly, and the basis of its dominance of the PC industry. But history has overlooked the contribution of Kildall, who Evans justifiably described as "the true founder of the personal computer revolution and the father of PC software" in...