Most people, who have access to the internet, use the Internet to send and receive messages.8 In many developing countries, businessmen can use the Internet instead of expensive and unreliable telecom systems. One of the most important Internet issues is security. 9 E-mail is the most popular and simplest application of the global computer network, covering over 100 countries and tens of millions of users. 10 Computer-aided design with a computer is most widely used in electronics, electrical engineering, mechanics, mechanical engineering, architecture.
1.Was
2.Was
3.Were
4.Were
5.Was