| O harfi ile başlayan terimler |
| OCR | OEM | On-Screen Silde | On | Online Editing | Open Look (Açık Bakış) | OPEN TEXT INDEX | Operand | Operasyonel | Operate | Operating System | Operator | OCR | Optical Disc | Optik Hafıza Devrimi | Optıbase | OS/2 Warp 3 | OS/2 | OSD (On Screen display) | OSF/MOTIF | OTR | Output | Overload | |