Comment on the following definitions of e-commerce adapted from the September 1999 issue of the IEEE Communications Magazine:

• It is the trade of goods and services in which the final order is placed over the Internet (John C. McCarthy).

• It is the sharing and maintaining of business information and conduction of business transactions by means of a telecommunication network (Vladimir Zwass).

• It consists of web-based applications that enable online transactions with business partners, customers, and distribution channels (Sephen Cho).