I have used 'ENG' and 'ENGG' in the past. I may be oversimplifying this, but I think US English calls for the former and British English calls for the latter.
Don't forget to use the "." (so it'd be "eng." or "engg.").
New Answer:
Abbreviations require stops while contractions do not.
'Engineering' as an abbreviation is written 'Eng.'
As a contraction it is written 'Engg' without the stop/period.
Engineering is an industry that provides specialized services related to manufacturing. These services are provided in automotive factories, fabrication companies, and others. The abbreviation for engineering is ENGRG.
First, learn to spell engineering, then I'll tell you how to abbreviate words.
Mechanical Engineering is sometimes abbreviated as MechE.
If in a multiple word term, it is often shortened to E or e, as in GE for genetic engineering or Eng or eng, as in C.eng and P.Eng for chartered engineer and professional engineer.
"chemE" and "chE" are the most popular, "CHEN" is also used at some universities.
ENG
Eng
BSME
Eng.
BS Engg(ME) - Bachelor of Science in Mechanical Engineering or BSc Engg(ME)
i abbreviate it as advs. You could also abbreviate it as adv.
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You cannot abbreviate the number.
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Grmny. That is how I abbreviate it on text. =]