Posted in Aviation, Government & Military, Organizations, Schools & Education, Science YSP stands for Yamaha Sound Projector YSP stands for Yield Spread Premium YSP stands for Yamaha Sports Plaza (Fairview, OR) YSP stands for Young Scientist Program (various schools) YSP stands for Yemeni Socialist Party (Yemen) YSP stands for Youth Smoking Prevention YSP stands for Youth Sailing Program (various organizations) YSP stands for Marathon, Ontario, Canada (Airport Code) YSP stands for Youth Shoulder Pad (sports equipment) YSP stands for Yale Summer Program YSP stands for Yearly Subscription Plan (auction plat form)