A telemetry system helps you in delivering information from different locations, even from a very distant place, moving and dangerous for where it is difficult for you to collect the data. It also delivers you the useful results in a very inexpensive manner just right to the comfort of your home.
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.