Abbreviations should be avoided (except when terms are commonly referred to by their initialisms, e.g., SPDS).
Additional Information:
When abbreviation is necessary due to space constraints, the words chosen for abbreviation should be those that are commonly known in their abbreviated form, and/or those words whose abbreviations can be unambiguously interpreted. To indicate that there is low pressure in the condensate storage tank, the use of 'CST Pressure Low' would be acceptable, but 'Condensate Storage Tank Prssr Lw' is not a good abbreviation. If the user enters an abbreviation for a command name, the system should use the same abbreviation when referring to that command in messages or prompts. The use of abbreviations or contractions in output text should be avoided.