Across
- 5. found everywhere
- 7. absolutely necessary
- 11. videos that give instructions on how to do something
- 12. modern society regarded as the period when the widespread use of computers
- 14. someone who is very interested in a particular subject and knows a lot about it:
- 15. very modern and with all the newest features:
Down
- 1. a small device or machine with a particular purpose
- 2. causes worry or alarm
- 3. an important discovery or event that helps to improve a situation or provide an answer to a problem:
- 4. necessary or needed
- 6. to improve the quality or usefulness of something, or change it for something newer or of a better standard:
- 8. two people or things having an effect on each other
- 9. the practical, especially industrial, use of scientific discoveries:
- 10. simple for people to use
- 13. someone who knows a lot about computers or other electronic equipment