TZ Limited is an Australia-based development company. It is engaged in the development of intelligent devices and smart device systems, which enable the commercialization of hardware and software solutions for the management, control and monitoring of business assets, and the provision of associated value added services through Telezygology Inc (TZI), as well as providing a fee for service product design and engineering consulting through Product Development Technologies Inc (PDT). Its operations are based in Australia, the United States, United Kingdom and Ukraine. The Company operates in two segments: PDT Holdings Inc, which operates its engineering and design division in the United States, United Kingdom and the Ukraine, and Telezygology Inc, which is engaged in the development and commercialization of hardware and software products primarily in the United States market.