OSAFn.初始子区字段；始端子域字段OSabbr.操作系统=（Operating System）Oscillatoria corallinaen.珊瑚颤藻Oscillatoria acutissiman.尖头颤藻oscillo-record camera示波图记录照相机oscillating disc method摆动盘法os ethmoidale lateralis侧筛骨oscillatory instability振动不稳定性,振荡不稳定性Osmanthus didymopetalusn.双瓣木犀Oscillatoria kansuensisn.甘肃颤藻OS System call CPU time统计项得知操作系统系统oscillating crank lever摆动曲柄杆