Computer hardware and recorded computer software programs sold as a unit in the nature of a cylinder asset management system for the management of self-contained breathing apparatus (SCBA) cylinder assets comprised of a handheld portable reader being an RFID reader that scans RFID tags and bar codes and non-downloadable computer software that allows users to log self-contained breathing apparatus (SCBA) cylinder fills, to enter and view cylinder data in the nature of, serial number, unique id...