Standard Operating Systems

12345678
Across
  1. 5. - rectifying, refining. Etc.
  2. 6. - rhymes with nation
  3. 7. - opposite of starting
  4. 8. - Call me!
Down
  1. 1. - ?
  2. 2. - Hello! How are you?
  3. 3. - Permission for something
  4. 4. - at the front; in front.