challenge

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Across
  1. 2. operating system which has plus sign in logo
  2. 4. used to make rectifier
  3. 5. f from fft
  4. 7. matrix laboratory
  5. 8. Artificial limb
  6. 9. r from MRI
Down
  1. 1. difference between darkest and lighest tones of image
  2. 3. t from CT scan
  3. 6. a component which can be used as current limiter
  4. 7. A FET further developed and upgraded by Microsoft Office Specialist