Personal digital assistants (PDAs); Apparatus for network communication; Electronic audible devices with books; Learning machines; Screens (photography); data cables; Mutual inductors (electricity); Video screens; cell phones; Portable media players; Television apparatus; smart speakers; Surveying apparatus and instruments; Electronic chips; Household remote controls; Mobile power supply (rechargeable batteries); Computer software applications, downloadable; downloadable computer software applications for cell phones; computer chatbot software for simulating conversations; face recognition devices; Time recording apparatus.