1. Each number in the series 2 - 4 - 8 - 16 is twice as large as the previous number.
2. Relay is a part of electrical equipment that receives radio or television signals and sends them on.
3. You may need to restrict access to certain files, i.e. to limit the number of people who can read them.
4. The interaction between the input and output hardware is controlled by software called the Basic Input Output System (BIOS).
5. I'm worried the heat from the lamp will melt the cord.
6. Though the operations of the first generation computers were very rapid in comparison with manual calculations, they were slow by today's standards.
7. A recent study of Open University graduates found that students aged 60 - 65 had better results than any other age group.
8. ENIAC consumed so much electricity that it sometimes caused power shortages in its home city of Philadelphia.
9. Third-generation technology allows you to download videos to a mobile phone.
10. Between 1946 and 1956, all computers had bulky central processing units that consumed massive amounts of energy.
11. My home PC is only six years old, but it is already obsolete compared to today's models.
12. Anyone who has ever bought something with a credit card – in person, by mail order, or over the Web – is included within some of the numerous customer databases.