Natural Science and Technology
- PSI (computational chemistry), software
- PSI (prion), an infectious protein in yeast
- Psi (instant messaging client), a popular XMPP client program
- Pandemic Severity Index, by the US Centers for Disease Control and Prevention
- psi (pounds per square inch), a unit of pressure
- Photosystem I, a protein complex involved in photosynthesis
- Pneumonia severity index
- Pollutant Standards Index, an air pollution measure
- Porous silicon, a material
- Program Specific Information, part of the MPEG transport stream protocol
- Protocol for Stage Illumination, a communications protocol geared towards stage lighting and effects control
- Protein Structure Initiative, a structural genomics initiative of the U.S. NIGMS
- J/ψ meson, a subatomic particle
- Water potential, denoted Ψ, in physical chemistry, the potential energy of a water solution relative to pure water
- Wave function, denoted ψ, in quantum mechanics
- 'Yaw' angle, denoted ψ in aerospace engineering, the rotation angle of a vehicle around the vertical axis with the Tait-Bryan convention
- Prediction-based Semantic Indexing, Permutation based method introduced by Sahlgren and his colleagues to encode structured medical knowledge.
- Potentially Shippable Increment, an acronym used in Scrum (development)
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Famous quotes containing the words natural science, natural, science and/or technology:
“Natural science will in time incorporate into itself the science of man, just as the science of man will incorporate into itself natural science: there will be one science.”
—Karl Marx (1818–1883)
“The poverty of our century is unlike that of any other. It is not, as poverty was before, the result of natural scarcity, but of a set of priorities imposed upon the rest of the world by the rich. Consequently, the modern poor are not pitied ... but written off as trash. The twentieth-century consumer economy has produced the first culture for which a beggar is a reminder of nothing.”
—John Berger (b. 1926)
“Human Nature is the only science of man; and yet has been hitherto the most neglected.”
—David Hume (1711–1776)
“The successor to politics will be propaganda. Propaganda, not in the sense of a message or ideology, but as the impact of the whole technology of the times.”
—Marshall McLuhan (1911–1980)