This document outlines the requirements for an online blood bank management system. The system will allow administrators to register blood donors and enter new blood details. It will track blood stock levels and facilitate blood sales and purchases. The system aims to automate the tracking of blood products from initial ordering through administration and updates to medical records. It will support routine transfusions as well as special cases and emergencies. The system requirements include specifications for hardware, software, databases, and functional modules for administrators, donors and acceptors.