Abbreviations and acronyms

• When acronyms are pronounceable, use upper and lower case with no spaces or full stops.

Example: ETA *Estimated Time of Arrival

• In all other cases, acronyms are in upper case with no spaces or full stops

Example: SLA (service level agreement)

• When used in text, write the words out the first time, followed by the abbreviation in brackets, thereafter the abbreviation can be used freely.

Example: the Subscriber Identity Module (SIM)