The Six Kingdoms. When Linnaeus developed his system of classification, there were only two kingdoms, Plants and Animals. But the use of the microscope led to the discovery of new organisms and the identification of differences in cells.A two-kingdom system was no longer useful.Today the system of classification includes six kingdoms.he Six Kingdoms. When Linnaeus developed his system of classification, there were only two kingdoms, Plants and Animals. But the use of the microscope led to the discovery of new organisms and the identification of differences in cells.
About PTC PTC (NASDAQ: PTC) is a global software company that delivers a technology platform and solutions to help companies design, manufacture, operate, and service things for a smart, connected world.
PTC Introduces Smart Connected Supportâ¢. PTC (NASDAQ: PTC) is a global provider of technology platforms and solutions that transform how companies create, operate, and service the âthingsâ in the Internet of Things (IoT). PTC's field-proven software and solutions are deployed in more than 26,000 businesses worldwide to generate a product or service advantage.