9 Apparatus and instruments for measuring and monitoring inventory at bars, pubs, clubs and restaurants, namely, flow meters, microcontrollers, circuit boards, sensors, modems, antenna, batteries and computer software used to measure and monitor volume of beverages served in gross as well as in comparison to the amount sold via cash register records, the rate of consumption, the temperature of the liquids, and the types of liquids flowing through the dispensation lines, namely, beer, water or line cleaning fluid; apparatus and instruments for monitoring gambling machines in pubs and restaurants, namely, microcontrollers, circuit boards, sensors, modems, antenna, batteries and computer software used to monitor time of play, amount of money spent at each machine, the rate of pay-out per machine, and if the machine is switched on and operational; apparatus and instruments for measuring and monitoring vending machine inventory and performance, namely, microcontrollers, circuit boards, sensors, modems, antenna, batteries, computer software used to measure and monitor time of vending, the specific items purchased, stock re-ordering levels; machine temperature, and whether the machine is switched on and operational; apparatus and instruments for measuring and monitoring fuel dispensed from gas stations, namely, flow meters; microcontrollers, circuit boards, sensors, modems, antenna, batteries and computer software used to measure and monitor rate of consumption, volume of fuel dispensed, volume delivered into fuel tanks, the temperature of liquid on delivery, and leakage detection