Acceleration sensors; Acid hydrometers; Circuit boards; Computer heat sinks; Electronic integrated circuits; Flow meters; Global positioning system (GPS) consisting of computers, computer software, transmitters, receivers, and network interface devices; Gyroscopes; Hydrometers; Hygrometers; Integrated circuit cards and components; Integrated circuit handlers, namely, machines for testing integrated circuits; Integrated circuit module; Integrated circuit modules; Integrated circuits; Integrated circuits, integrated circuit chips, and integrated circuit modules for digital video compression and decompression; Integrated circuits, integrated circuit chips, and integrated circuit modules for encoding and decoding digital video; LAN (local area network) hardware; Laser diodes; Light emitting diodes (LEDs); MP3 players; Power adapters; Solar panels for production of electricity; Wireless transmitters and receivers; A mesh network of temperature probes which measures the internal temperatures of compost piles and wirelessly transmits the temperature data to a computer; Document printers for use with computers