SPL
Superconducting Proton Linac
Superconducting Proton Linac
Not spokesman or spokeswoman
Note that the plural form is spokespersons, not spokespeople
Super Proton Synchrotron
Acronym doesn't need spelling out for the CERN Courier
SPS and PS Experiments Committee
Caps when referring to the theory of particle physics.
The Standard Model is a theory that describes particle physics. The MacBook is a standard model of computer.
Add a hyphen when using the term as a compound adjective:
The results of the experiment were consistent with Standard-Model predictions.
Avoid abbreviating Standard Model to SM. It’s irritating to the reader to have to check back on unnecessary abbreviations.
not moving