Information technology encompasses computers, computer networks, television, telephones and other information distribution technologies. It includes computer hardware, software, electronics, semiconductors, the internet, telecommunications equipment, engineering, healthcare, e-commerce and computer services. While computers existed before 1978, they were mainly used for calculations. The term "information technology" was coined once computers began indexing and sorting written information. Modern information technology applications include cable TV, video on demand, multimedia conferencing, e-commerce, ATMs, and more across many fields.