Military Gets Main Use of Big Computers
Civilian scientists say they are being forced into sometimes bitter competition with military researchers and with each other for resources they need to compute problems so complex that only world's fastest, most powerful computers can produce adequate solutions; Government pays for 19 percent of supercomputers built in United States each year and for 100 percent of top-end machines that break ground in speed and power; since cold war, Government has given civilian and military scientists rough parity in parceling out time on supercomputers; parity became 2-to-1 ratio in favor of military in 1996, and it will tilt to 5-to-1 ratio by 1999; tug-of-war between civilian and military scientists is result of disparities in budgets of National Science Foundation and Energy Dept (M)