Measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; monitoring, tracking and data logging apparatus and instruments; apparatus and instruments for controlling the operation of hand-held and portable electronic appliances including mobile phones/cellular phones, apparatus and instruments for selectively over-riding the operation of hand-held and portable electronic appliances including mobile phones/cellular phones; apparatus and instruments for remotely enabling and over-riding operation of hand-held and portable electronic appliances including mobile phones/cellular phones; computer software for use with the aforementioned goods, including applications (apps) for installation on hand-held and portable electronic appliances including mobile phones/cellular phones; accessories for use with mobile phones/cellular phones, including cradles, carriers, cases, holders, connectors adapted for automotive use, hands-free kits