Point of Sale (POS) is an offline-first Progressive Web App (PWA) built with modern web technologies (Vue 3, TypeScript, Tailwind CSS, Pinia, Dexie.js, Express.js, Prisma ORM, PostgreSQL) that aims to provide a digital solution for retail and grocery store (warung sembako) management. It delivers an integrated and responsive experience that makes it easy for cashiers to process high-speed sales and handle decimal units offline, while also providing a reliable system for store owners to monitor inventory and sync transaction data effectively.