This simulator demonstrates the fundamentals of accounting principles and financial record-keeping — how businesses track income, expenses, assets and liabilities through double-entry bookkeeping. Pick a real journal entry (owner investment, equipment purchase, credit sale, loan, expense payment) and an amount, then post it: every entry debits one account and credits another for the same value, and a live 3D bar chart of eight accounts — Cash, Accounts Receivable, Equipment and Inventory on the assets side; Accounts Payable and Loans Payable as liabilities; Owner's Capital and Retained Earnings as equity — animates to the new balances. Live readouts track Total Assets, Total Liabilities and Total Equity, and the balance indicator confirms the accounting equation Assets = Liabilities + Equity after every posting, exactly as it must in a real general ledger.