It's customary to write Debit on the Left side and Credit on the Right side in double-entry accounting system.
The difference between the total of all debits and the total of all credits is the "Balance". The genesis of these words dates back to a little over 500 Years and the credit goes to an Italian named Friar Luca-Pacioli.
Friar Luca-Pacioli. is the first to use the Latin terms
Credre meaning "to entrust something"‘: Short form "Cr" and
Debere meaning "to owe someone" : Short form "Dr"
(That's how "r" in Dr from Debere ).
Later, these words got transformed into ‘Debit and Credit’.