PSS

PSS may refer to:

In science:
*Packet Switch Stream, a British packet-switched network
*Peroidic Steady State:
** Peroidic Steady State Analysis
** Peroidic Steady State Solution
*Plasma sound source, a means of making sonar underwater
*Polystyrene Sulfonic Acid, also known as Sodium polystyrene sulfonate or poly(styrenesulfonate)
*Porcine stress syndrome, a disease sometimes occurring in pigs
*Portosystemic shunt, a disease found in humans, cats and dogs
*Progressive systemic sclerosis, a rare chronic disease
*Probabilistic Signature Scheme, a secure way of creating signatures with RSA (see also: PKCS1#Schemes)
*Practical Salinity Scale, the conductivity ratio of a sea water sample to a standard KCl solution
*Physical symbol system, Hypothesis concerning cognition. Closely connected to AI-research

In society:
*Preventive Security Service, security force of Palestinian Authority
*Presidential Security Service, security force in South Korea, responsible for protecting the President of South Korea
*Society of Saint-Sulpice ( _la. Societas Presbyterorum a S. Sulpitio), a clerical congregation of the Catholic Church
*"Parti socialiste sénégalais", the Senegalese Socialist Party
*"Parti socialiste suisse", the Social Democratic Party of Switzerland
*Liverpool Personal Service Society, PSS - a UK based charity

In environmental science and design:

*Product service system, a system of consumer access to products, as an alternative to personal product ownership

Other:
*Product Support Services, a Microsoft business unit
*Radio controlled glider#PSS for Power Scale Soaring, A form of radio controlled model flying
*Paikiasothy Saravanamuttu Stadium, a sporting stadium in Colombo, Sri Lanka
*PSS Silent Pistol, a Soviet-designed silent handgun
*Phoenix Simulation Softwares, a former virtual aircraft's development group, aimed to Microsoft Flight Simulator's platform
*Pinetree Secondary School