1) Alphabet beginning 2) Alphabet opener 3) Alphabet opening 4) Alphabet quartet 5) Alphabet sequence 6) Alphabet starters 7) Alphabet vanguard 8) Alphabetic quartet 9) Alphabetic starters 10) Alphabetical run 11) Alphabetical start 12) Beginning in first grade 13) Beginning of a nursery rhyme 14) Black verse rhyme scheme 
ABCD is a list of the first four letters in the English alphabet. It may also refer to:``` ==Medicine== ==Science== ...
Association of Biomedical Communications Directors
European Advisory Board on Cat Diseases
Airway, breathing, circulation, disability