Opal lamp - Overcorrection
- Outsides
- Outsize [over-sized] book
- Ovaling
- Oven
- Oven dryer
- Over correction
- Over impression print
- Over matter
- Over pressure
- Over-absorption of ink
- Over-speed roller
- Overall contrast
- Overall density
- Overall depth
- Overall dimensions
- Overall direct mail response rate
- Overall production
- Overall quality
- Overall renewal rate
- Overburn