Tech Talk 2 - A cryptic crossword

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Across
  1. 2. Fails to measure computer performance (5)
  2. 3. A place to store a collection of similar items (5)
  3. 7. Process relating to an object (6)
  4. 8. An environment used for transportation in ships (9)
  5. 9. It isn't copyright (8)
  6. 14. Sapiens proprietary technology becomes visible (6)
  7. 15. In winter bears do object–relational mapping (9)
  8. 18. Works in ports for development operations (6)
  9. 19. Cuts roughly and steals data (6)
  10. 20. Communicates with a network and receives guests (4)
  11. 21. Shanghai or Singapore, HDMI or USB (4)
Down
  1. 1. Obstruction to jewellery in digital ledger (10)
  2. 4. A common language in Indonesia (4)
  3. 5. Ask about data (5)
  4. 6. Respond with UI components (5)
  5. 9. Servers in the sky (5)
  6. 10. Secret words to let you in (8)
  7. 11. Outsider's key (7)
  8. 12. Odd dental problem helps connect to the network (9)
  9. 13. TV program shown on the internet? (9)
  10. 16. Conceal data in an underground room? (7)
  11. 17. Causes pain, I hear, to measuring clocks (5)