use italics

Always spell out the name of the particle – do not use the mathematical symbol in text.

The mathematical symbols may be used in diagrams only when they are spelled out in full in the accompanying caption. See graphs and charts.

Whenever you link to a PDF, make sure to put the link on the letters [PDF] inside square brackets. This is for people using the website on a mobile phone – PDFs can take a long time to load. 

Find out more about CERN in the general brochure [PDF]

Positron-Electron Project (SLAC)

Acronym doesn’t need spelling out for the CERN Courier

Write per cent, not "percent". If using the % sign, don't put a space between it and the digit:

Of the 5000 people who answered the survey, 10% (or 10 per cent) were French.

58%, 90%, etc.

When calculating percentages, beware the "rose by/fell by X%" construction: an increase from 3% to 5% is a 2-percentage-point increase or a 2-point increase, not a 2% increase

Never use the "per thousand" symbol, ‰

use italics

Pension Fund Governing Board

Pioneering High Energy Nuclear Interaction eXperiment (BNL)

Acronym doesn’t need spelling out for the CERN Courier

PHOton Spectrometer (ALICE experiment)

Plural: photons.

A particle representing a quantum of light or other electromagnetic radiation.

Performance-improving consolidation of the LHC

Or PIN number (although PIN stands for personal identification number, the tautology is in near universal use), not Pin or pin number

use ndash

When quoting country, state or county names after the name of a town, set commas before and after:

New results were announced at the conference in Osaka, Japan, last week.

UK

It is not necessary to say that London is in the UK. For all other UK cities, spell out explicitly that they are in the UK. 

A team of physicists from Manchester in the UK reported that…

See time

but policymaker in the CERN Courier

Practice makes perfect

I practise piano every night