The rapid growth of science and technology has led to the consequent inventions of different types of measuring instruments, which include water flow meter, air flow meter and gas flow meter. The flow meters are tools, which are used for measuring the flow of liquid, gas or air.
In terms that are more common, we can refer eCommerce as the platform for buying and selling of products and services through business and services over internet. In a simplest form people use this term as online shopping. Both the terms means one and the same thing.