| IEEE | Institute of Electrical and Electronic Engineers |
| IGES | Initial Graphics Exchange Specification |
| IMG | IMaGe |
| IMHO | In My Humble Opinion |
| I/O | Input/output |
| IRC | Internet Relay Chat |
| IRQ | Interrupt Request |
| ISA | Industry Standard Architecture |
| ISDN | Integrated service digital network |
| ISO | International Organization for Standardization |
| ISP | Internet Service Provider |
| ISV | Independent Software Vendor |
| JPEG | Joint Photographic Experts Group |
| K or KB | Kilobyte, (K or k by itself can mean 1024 or 1000 units) |
| KBPS | KiloBits Per Second |
| LAN | Local Area Network |
| LASER | Light Amplification by Stimulated Emission of Radiation |
| LCD | Liquid Crystal Display |
| LED | Light-Emitting Diode |
| LUT | Look Up Table |
| LVT | Light Valve Technology |
| LW | Line Work |
| MB | Megabyte |
| MBPS | Megabits per second |
| MCA | Micro Channel Architecture (internal bus for IBM PS/2 |
| MDA | Monochrome Display Adapter (video display standard) |
| MFLOPS | Million FLoating-point Operations Per Second |
| MFM | Modified Frequency Modulation (disk format standard) |
| MGA | Monochrome Graphic Adapter (video display standard) |
| MHz | MegaHertZ-frequency unit equal to one cycle per second, see also kHz, KHz |
| MICR | Magnetic-Ink Character Recognition |
| MIPS | Millions of Instructions Per Second |
| MIS | Management information system (or service) |
| MODEM | MOdulator/DEModulator |
| MS-DOS | Microsoft Disk Operating System |
| MTBF | Mean Time Between Failures |
| NFS | Network File System (distributed file system from Sun) |
| NTSC | National Television System Committee (U.S. color TV standard) |
| NuBus | (32-bit bus architecture for Macintosh II computers) |
| OCR | Optical Character Recognition |
| OEM | Original Equipment Manufacturer |
| OS | Operating system |
| OSF | Open Software Foundation |
| OSI | Open Systems Interconnection (ISO standard communications protocol) |
| PAL | Phase Alternating Line system (European color TV standard) |
| PAL | Programmable Array Logi |
| PC | Personal Computer |
| PCB | Printed Circuit Board |
| PCMCIA | Personal Computer Memory Card International Association |
| PCX | raster graphics format for PC Paintbrush |
| PDL | Page-Description Language |
| PDS | Processor Direct Slot |
| PDX | Printer Description Extension |
| PE | Printer's Error |
| PGA | Professional Graphics Adapter (video display standard) |
| PHIGS | Programmers Hierarchical Interactive Graphics Standard (language for creating 2-D and 3-D graphic images) |
| PIC | Lotus file format |
| PICT | Macintosh PICT file format for graphics |
| PMMU | Paged Memory Management Unit |
| PMS | Pantone Matching System |
| PMT | Photomechanical Transfer (photostat) |
| PMT | Photomultiplier Tube |
| PPD | PostScript Printer Description (includes APDs and PDXs) |
| PPI | Pixels Per Inch |
| PROM | Programmable Read-Only Memory |
| PWS | Personal Web Server |
