A mesh network of temperature probes which measures the internal temperatures of compost piles and wirelessly transmits the temperature data to a computer; Abdominal belts containing built-in speakers for purposes of transmitting music/sounds/educational material to a fetus and built-in pockets in which to carry audio transmitters; Accumulators; Accumulators and batteries; Acidimeters for batteries; Air filters for automation equipment, namely, computers and copier machines; An optical metrol...