Unidentified Flying Objects. I think that fits the description pretty well.
U (จำแนกไม่ได้) F (บิน) O (วัตถุ) ผมว่า มันให้ความหมายตรงดีทีเดียวSqueeze (1993)
Though this agent can corroborate Agent Mulder's account of two unidentified flying objects in the northern sky over Ellens Air Base, their exact nature or design could not be determined.