It is quite normal to abbreviate long terms usually more than 2 words to simplify the scientific text and reduce space in scientific manuscripts, i.e., conference papers and journal articles. For instance, Service Oriented Architecture is SOA or Mobile Cloud Computing is MCC.
However, my question is how to write them properly. I know that when we abbreviate, we should first put the full form followed by abbreviated form in parentheses. Every repetition of the term afterward must be in abbreviated form.
But, I have seen two different ways of writing them. The first one is (no capitalized initial):
service oriented architecture (SOA) mobile cloud computing (MCC)
the second is (capitalized initial):
Service Oriented Architecture (SOA) Mobile Cloud Computing (MCC)
Which one is correct or more accurate?