(FORTUNE Magazine) – Nearly one in eight chief executives of large corporations has a personal computer blinking on his desk, according to a survey by Personal Computing magazine. The results of the survey, published in the magazine's March issue, defy the conventional wisdom that top bosses resist doing their own word processing and data analysis and get underlings to do it for them. ''We anticipated about 5% and we got about 12%,'' said Charles Martin, editor of the magazine. Fifty-nine of 500 top executives surveyed said they used a personal computer in the office. Two said they used two, and one even had three. While home use was not measured, several C.E.O.s volunteered that they had another computer at home. Though it comes as no surprise that John Young of Hewlett-Packard and Charles E. Exley Jr. of NCR use PCs, the survey showed that C.E.O.s of high- tech companies aren't the only ones bitten by the bug. Mack Trucks C.E.O. John Curcio, Duke Power Chairman William Lee, C.E.O. J. Tylee Wilson of R.J. Reynolds, and Quaker Oats Chairman William Smithburg all turned out to be computer buffs. Procter & Gamble Chairman Owen Butler reportedly uses his to build spreadsheets and dabble in programming. One indication of IBM's domination of the corporate market: 25 C.E.O.s reported using the IBM PC, vs. three Apple IIs and one lonely Macintosh.