Electronic animal confinement systems; electronic receivers for operating electronic animal confinement systems; electronic transmitter-controller and automated pet door combination sold as a unit; electronic transmitters that activate automated pet doors; electronic pet training device in the form of a mat that conditions animals to avoid designated areas; combination electronic and spray pet training device that conditions animals to avoid designated areas; electronic confinement and training apparatus in the form of a mat; ultrasonic outdoor bark control devices, namely, sensors for detecting barking and emitting ultrasonic sound to control barking; animal protection and safety apparatus, namely, flotation devices for animals; messenger bags especially adapted for holding laptops; magnetic devices that activate self-unlocking pet doors; graduated rulers; electronic animal training devices, namely, ultrasonic sound emitters; electronic animal training systems comprised of hand held transmitters and animal collars with receivers attached worn by animals to activate a method of stimulation or correction; computer storage devices, namely, blank flash drives