Fast retail checkout with stock and accounting behind it.
A till that is fast enough to use at a queue, with the stock and the accounts kept behind it automatically.
Touch friendly till, barcode scanning, held sales, returns and multiple payment methods including M-Pesa.
Every sale moves stock. Reorder levels, suppliers, purchases and stock takes keep the shelf and the system in step.
Run more than one till or branch and consolidate the reporting.
Sales, purchases and expenses post to real accounts, so the books are a by-product of trading.