9 downloadable computer application software for mobile phones, namely, software for detecting, reporting, analysing and managing foreign object debris on airfields; downloadable mobile applications for detecting, reporting, analysing and managing foreign object debris on airfields; downloadable computer simulation software for modelling customer operations and investment decisions; downloadable computer application software for mobile phones, namely, software for secure audio-visual communications; downloadable mobile applications for secure audio-visual communications; downloadable and recorded computer software for calculating, optimizing, and managing air-to-air refuelling missions; downloadable and recorded virtual reality software for aircraft maintenance training; downloadable and recorded virtual reality software for simulating aircraft maintenance processes in a virtual environment; electronic sensors for measuring humidity in storage containers; downloadable computer software for connecting, operating and managing networked sensors in the internet of things (IoT); downloadable computer software for monitoring humidity in storage containers to prevent corrosion