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Across
  1. 1. Prefix for anything involving virtual or digital threats.
  2. 5. Online test to tell humans from bots — often asks you to “spot the traffic light” .
  3. 6. Microsoft’s OS that introduced the Start menu.
  4. 7. A DSA structure with LIFO order — also what “overflows” on a famous Q&A site (5).
  5. 8. The annoying lag between click and response (7).
  6. 9. The coder’s social network for sharing repos (6).
Down
  1. 2. Microsoft’s old web browser — or the Windows file manager.
  2. 3. The digital ledger tech behind Bitcoin and more.
  3. 4. Coffee-inspired programming language once said to “run everywhere” (4).
  4. 8. Open-source OS mascot is a penguin named Tux (5).