| NETBIOS | Network Basic Input and Output System [IBM] |
| BIOS | Basic Input Output System [engl.] Betriebssystem für Microcomputer |
| IOCS | Input/Output Control System |
| XIOS | Extended Input / Output System |
| PCIOS | Processor Common Input Output System |
| CIOCS | Communication Input/Output Control System [IBM] |
| I/O | Input/Output |
| ngio | Next Generation Input/Output [bus] |
| IOC | Input Output Controller |
| IOP | Input Output Processor |
| MIO | Modular Input Output |
| IOCTL | Input/Output Control |
| IOFEXT | Input Output Far End Crosstalk |
| IOP | Input-Output Processor |
| ICH | Input/output Controller Hub |
| VIO | Video Input Output |
| LIO | Low-cost Input/Output |
| PIO | Parallel Input / Output |
| PIO | Programmed Input / Output |
| IOS | Input Output Subsystem |
| SIO | Serial Input Output |
| PIO | Processor Input / Output |
| XIO | Extended Input Output |
| DIO | Data Input Output |
| I2O | Intelligent Input/Output |
| DIO | Data Input and Output |
| BIO | Buffered Input // Output [engl.] Gepufferte Ein-/ Ausgabe |
| IOPL | Input/Output Priviledge Level |
| FIOC | Frame Input/Output Controller |
| AIO | Asynchronous Input / Output [engl.] Mit diesem Mechanismus können Applikationen mehrere Ein- und Ausgabeoperationen gleichzeitig anstoßen |
| FFIO | Flexible File Input/Output |
| IOC | Input/Output Computer [Aptec] |
| ASIO | Audio Stream Input Output [engl.] |
| IOSGA | Input/Output Support Gate Array |
| IOMMU | Input Output Memory Management Unit |
| bor | Basic Output Report [engl.] |
| MIMO | Multiple Input Multiple Output |
| COINS | Computer Output Information System |
| BMS | Basic Management System [engl.] |
| BCS | Basic Control System [engl.] |
| BUS | Basic Utility System [engl.] |
| BES | Basic Executive System [engl.] |
| BOS | Basic Operation System [engl.] Computer-Betriebssystem |
| BDOS | Basic Disk Operating System [engl.] |
| BFAS | Basic File Access System [engl.] |
| BDFS | Basic Disk Filing System [engl.] |
| boss | Basic Operating System Services [engl.] |
| BLACS | Basic Linear Algebra Communication System [engl.] |
| BSSMAP | Basic Station System Management Application Part [engl.] |
| IN | Input |