Parallel System Support Program (IBM)并行系统的支持程序(IBM) Personnel Security and Surety Program工作人员安全与程序 Potomac Society of Stereo Photographers波的立体摄影学会 Pre-Separation Services ProgramPre-Separation服务项目 Professional Student Services Personnel专业的学生服务人员 Penicillin Susceptible Streptococcus Pneumoniae青霉素敏感链球菌 Prostitutes' Safe Sex Project妓女的安全的性行为的项目