Z-ERP by Z Systems is an integrated POS, inventory, and accounting system for retailers and wholesalers with one or many branches. It runs in the cloud with live sync across branches and warehouses, and offers a local edition that works fully offline and syncs when the connection returns. Per-cashier permissions and a tamper-evident audit log of voids, discounts, and price edits protect the till. It issues tax invoices with QR codes, offers a ZATCA e-invoicing submission service for Saudi Arabia, and works with standard POS hardware.