Abbreviations which are not known to many of us

Abbreviations which are not known to many of us:

Aim: Ambition in mind
Chess: Chariot, Horse, Elephant, Soldiers
Cold: Chronic obstructive lung disease
Joke: Joy of kids entertainment
Date: Day and time evolution
Eat: Energy and taste
Tea: Taste and energy admitted
Pen: Power enriched in nib
Smile: Sweet memories in lip expression
Bye: Be with you every time