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Across
  1. 3. someone who promotes and sells goods and services
  2. 7. a chair fitted with wheels
  3. 9. a machine that used to collects dust and small particles from floor and other surfaces
  4. 11. treatment with a vaccine to produce immunity to a particular infectious disease
  5. 12. someone who cares for people who are sick or injured
  6. 13. a roughly open container
  7. 18. messages distributed to other people by phones or computer
  8. 19. a list of items on sale
  9. 20. a device for making an electrical connection
  10. 23. a machine for printing text or pictures onto paper
  11. 24. an electronic device for storing and processing data
  12. 25. an electronic device that plays audio compact discs
  13. 26. a device that projects an Image or video
  14. 27. a pen that used to write at whiteboard
  15. 28. a wipeable board with a white surface used for teaching or presentations
  16. 29. someone who works with electricity
  17. 30. an instrument for measuring and indicating temperature
Down
  1. 1. a machine that used to drill a holes in materials.
  2. 2. someone who is responsible for looking after an office
  3. 4. an electric version of whiteboard
  4. 5. someone who cleans houses, offices, and buildings
  5. 6. goods or services that can be bought and sold
  6. 8. a computer resource for recording data in a computer storage device
  7. 10. technology used to connect computers with peripheral devices
  8. 14. dress of a distinctive design or fashion worn by members of a particular group
  9. 15. a wire used for transmitting electricity
  10. 16. someone who enters information and data for digital store
  11. 17. someone
  12. 21. a tool used for wiping floors
  13. 22. a device for transmitting voices over a distance using wire or radio