| A | B |
| EFS | Encrypting File System |
| EIDE | Enhanced Integrated Drive Electronics |
| EMI | Electromagnetic Interference |
| EMP | Electromagnetic Pulse |
| EPROM | Erasable Programmable Read-Only Memory |
| EPP | Enhanced Parallel Port |
| ERD | Emergency Repair Disk |
| ESD | Electrostatic Discharge |
| EULA | End-User License Agreement |
| EVGA | Extended Video Graphics Adapter/Array |
| EVDO | Evolution Data Optimized or Evolution Data Only |
| FAT | File Allocation Table |
| FAT12 | 12-Bit File Allocation Table |
| FAT16 | 16-Bit File Allocation Table |
| FAT32 | 32-Bit File Allocation Table |
| FDD | Floppy Disk Drive |
| Fn | Function (referring to the function key on a laptop) |
| FPM | Fast Page Mode |
| FRU | Field Replaceable Unit |
| FSB | Front Side Bus |
| FTP | File Transfer Protocol |
| FQDN | Fully Qualified Domain Name |
| Gb | Gigabit |
| GB | Gigabyte |
| GDI | Graphics Device Interface |
| GHz | Gigahertz |
| GUI | Graphical User Interface |
| GPS | Global Positioning System |
| GSM | Global System for Mobile communications |
| HAL | Hardware Abstraction Layer |
| HAV | Hardware-Assisted Virtualization |
| HCL | Hardware Compatibility List |
| HDD | Hard Disk Drive |
| HDMI | High-Definition Media Interface |
| HPFS | High-Performance File System |
| HTML | Hypertext Markup Language |
| HTPC | Home Theater PC |
| HTTP | Hypertext Transfer Protocol |
| HTTPS | Hypertext Transfer Protocol Over Secure Sockets Layer |
| I/O | Input/Output |
| ICMP | Internet Control Message Protocol |
| ICR | Intelligent Character Recognition |
| IDE | Integrated Drive Electronics |
| IDS | Intrusion Detection System |
| IEEE | Institute of Electrical and Electronics Engineers |
| IIS | Internet Information Services |
| IMAP | Internet Mail Access Protocol |
| IMEI | International Mobile Equipment Identity |
| IMSI | International Mobile Subscriber Identity |
| IP | Internet Protocol |
| IPCONFIG | Internet Protocol Configuration |
| IPP | Internet Printing Protocol |
| IPS | In-Plane Switching |
| IPSec | Internet Protocol Security |
| IR | Infrared |
| IrDA | Infrared Data Association |
| IRP | Incident Response Plan |
| IRQ | Interrupt Request |
| ISDN | Integrated Services Digital Network |
| ISO | International Organization for Standardization or Industry Standards Organization |
| ISP | Internet Service Provider |
| JBOD | Just a Bunch of Disks |
| Kb | Kilobit |
| KB | Kilobyte or Knowledge Base |
| LAN | Local Area Network |
| LBA | Logical Block Addressing |
| LC | Lucent Connector |
| LCD | Liquid Crystal Display |
| LDAP | Lightweight Directory Access Protocol |
| LED | Light Emitting Diode |
| LI-ON | Lithium-Ion |
| LPD/LPR | Line Printer Daemon/Line Printer Remote |
| LPT | Line Printer Terminal |
| LVD | Low Voltage Differential |
| MAC | Media Access Control/Mandatory Access Control |
| MAPI | Messaging Application Programming Interface |
| MAU | Media Access Unit or Media Attachment Unit |
| Mb | Megabit |
| MB | Megabyte |
| MBR | Master Boot Record |
| MBSA | Microsoft Baseline Security Analyzer |
| MFD | Multi-Function Device |
| MFP | Multi-Function Product |
| MHz | Megahertz |
| MicroDIMM | Micro Dual Inline Memory Module |
| MIDI | Musical Instrument Digital Interface |
| MIME | Multipurpose Internet Mail Extension |
| MIMO | Multiple Input, Multiple Output |
| MMC | Microsoft Management Console |
| MP3 | Moving Picture Experts Group Layer 3 Audio |