Large Hadron Collider

Initial capital letters. Always spell out first time (except in the CERN Courier), with abbreviation in brackets. Use the abbreviation thereafter.

Experiments at the Large Hadron Collider (LHC) suggest...

Beware of tautologies: Don't use "The LHC machine" or "The LHC accelerator", as this is equivalent to saying "The Large Hadron Collider accelerator...", which doesn't mean anything (the LHC doesn't accelerate accelerators).

Large Hadron Collider forward experiment

Acronym doesn't need spelling out for the CERN Courier

Laser Interferometer Gravitational-Wave Observatory

Spell out in first use then use acronym for the CERN Courier

Laboratori Nazionali di Frascati ​(Frascati National Laboratory)

Spell out in first use then use acronym for the CERN Courier