Crossword Puzzle Office services giant

Clue: Office services giant

Office printing giant (EPSON with 5 letters)
Office equipment giant (EPSON with 5 letters)
Box-office giant (ROBERTREDFORD with 13 letters)
Office machine giant (XEROX with 5 letters)
Dutch financial services giant (ING with 3 letters)
Citizenship and Immigration Services head office? (HOUSEOFGREENCARDS with 17 letters)
Box-office take (GATE with 4 letters)
Home Box Office, for short (HBO with 3 letters)
Box-office backup (LINE with 4 letters)
Common office machine (FAX with 3 letters)