Electronic timers and electronic labels for medical use; electronic timers and electronic labels for use in healthcare; electronic timers to track and time the expiration of pharmaceuticals, medical preparations, blood and plasma products, body tissues and body fluids, and chemicals for scientific and laboratory use; electronic timers to track and time the review, function and removal of medical devices; electronic timers to track and time the shipment and expiration of medical preparations, blood and plasma products, allograft tissues, and organs and tissue; electronic timers to track and time the disposal of medical waste; electronic timers to track and time cleaning schedules; electronic timers to track and time the expiration of temperature validated shipping cartons; electronic timers to track and time the expiration of water and environmental samples as well as samples taken in healthcare