Abbreviations and acronyms

123456789101112131415161718
Across
  1. 1. Same as 13 across
  2. 4. as soon as possible
  3. 5. Short name for London Underground
  4. 7. &
  5. 8. British Telecom
  6. 9. Place for a short drink
  7. 12. Royal Navy
  8. 13. Federal bureau of Investigation
  9. 14. Father
  10. 15. Means 'or nearest offer'
  11. 16. Music disc
  12. 17. British car-plate
  13. 18. South East
Down
  1. 1. Means 'especially'
  2. 2. America
  3. 3. Famous film alien from outer space
  4. 4. Serious illness
  5. 6. N, S, E or W
  6. 8. 'Please note' backwards
  7. 9. CENT %
  8. 10. Short for biological(ly)
  9. 11. Flying saucer
  10. 12. Rest In Peace
  11. 14. Refrigerators