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Many different inhalation devices are now available for the treatment of asthma . As different delivery devices become available , such as PDAs , cell phones , in-car navigation systems , and others , content and structure will have to be personalized for these devices ( Billsus , Brunk , Evans , Gladish , Pazzani , 2002 ) . Nearly 80 different security devices have been built into the notes - holograms , inks that change color when notes are tilted in the light , microprinting , metallic threads , coded designs . In a low-key and respectful way , he kept asking why different consumer devices do n't work together .