Before 'account' meant a login or a bank balance, it meant the act of reckoning — tallying up what was owed. The word traces to Latin computare, a compound of com- ('together') and putare ('to reckon'), which itself originally meant 'to prune' — clearing away branches to see clearly, then clearing away confusion to think clearly. Old French reshaped computare into aconter ('to count up'), and the Anglo-Norman noun acunte entered English in the fourteenth century. The financial meaning came first: merchants kept accounts. The narrative meaning followed naturally — to 'give an account' was to render a reckoning of events, laying them out as clearly as a ledger. The same Latin root also gave us 'compute', 'count', 'recount', and eventually 'computer', making the humble bank account a relative of the machine that now manages it.