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)
Read more about this topic: Psi
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“Give me a country where it is the most natural thing in the world for a government that does not understand you to let you alone.”
—Henry David Thoreau (1817–1862)
“Our science has become terrible, our research dangerous, our findings deadly. We physicists have to make peace with reality. Reality is not as strong as we are. We will ruin reality.”
—Friedrich Dürrenmatt (1921–1990)
“Radio put technology into storytelling and made it sick. TV killed it. Then you were locked into somebody else’s sighting of that story. You no longer had the benefit of making that picture for yourself, using your imagination. Storytelling brings back that humanness that we have lost with TV. You talk to children and they don’t hear you. They are television addicts. Mamas bring them home from the hospital and drag them up in front of the set and the great stare-out begins.”
—Jackie Torrence (b. 1944)