| ACM | Authenticated Code Module | 
| ACPI | Advanced Configuration and Power Interface | 
| BCT | Intel Binary Configuration Tool | 
| BFV | Boot Firmware Volume | 
| BoardPkg | The EDK II package a developer creates to port the Minimum Platform for their motherboard or family of motherboards | 
| BSF | Boot Setting File | 
| CAR | Cache-As-RAM | 
| Component | An executable binary. Typically UEFI defined, e.g. PEIM, DXE driver, SMM driver, or UEFI application. Also used to refer to other system binaries. Not appropriate for statically linked libraries. | 
| DXE | Driver execution environment. Role is to load drivers for system devices. Finds and executes boot code. After OS loads, it handles OS to UEFI calls. | 
| DSDT | Differentiated System Description Table | 
| EC | Embedded Controller | 
| EDK | EFI Development Kit | 
| FACS | Firmware ACPI Control Structure | 
| FADT | Firmware ACPI Description Table | 
| FFS | EFI Firmware File System Specification | 
| FRU | Field Replaceable Unit, the minimal silicon that can be added or removed from a system, e.g. | 
|  | an SoC, a MCP, a standalone processor or PCH. | 
| FSP | Intel® Firmware Support Package | 
| Full Platform | A platform implementation that includes the minimal features, as well as some number of advanced features. (Stage I-VII). Note: most advanced features may not be described in this document. | 
| FV | Firmware Volume, a UEFI Forum defined firmware storage container | 
| GPIO | General Purpose Input/Output | 
| GUID | Globally Unique Identifier(s) | 
| HOB | Hand Off Blocks(s) | 
| Hybrid EDKII | Any Module that contains both EDKII compliant wrapper code, and non EDK payloads (e.g., CSM-bin or FSP-bin) | 
| IBB | Initial Boot Block | 
| IFWI | Integrated Firmware Image, includes things like UEFI firmware, microcode, microcontroller and firmware, configuration data. | 
| Term | Definition | 
| IPL | Initial Program Load | 
| MASM | Microsoft Macro Assembler | 
| Minimum Platform | A platform implementation that only includes the minimal features. (Stage I-VII) | 
| MinPlatformPkg | The EDK II package that contains common elements of the platform architecture. | 
| Module | Typically any EDK II independently buildable item, includes static libraries and executables. | 
| MOR | Memory Overwrite Request. See Trusted Computing Group documentation. | 
| MTRR | Memory Type Range Register | 
| NASM | Netwide Assembler | 
| Native EDKII | All modules build with only EDKII compliant source code, and no non-EDK payloads (e.g., CSM-bin, LegacyOpRom, or FSP-bin) | 
| NVRAM | Non-Volatile Random Access Memory | 
| OBB | OEM Boot Block | 
| OPROM | Option ROM | 
| PCD | Platform Configuration Database | 
| PEI | Pre EFI Initialization. Role is to initialize memory, and also initialize enough of the system to run DXE. | 
| PEIM | Pre-EFI Initialization Module | 
| PI | Platform Initialization | 
| PPI | PEIM-to-PEIM Interface | 
| RSDP | Root System Description Pointer | 
| RSDT | Root System Description Table | 
| SEC | Security phase. Role is to initialize the system far enough to find, validate, install and run PEI. | 
| SiliconPkg | The EDK II Package that contains silicon support for a system. | 
| SIO | Super I/O is a type of I/O controller IP. Typical functionality provided are one or more serial port UARTs, keyboard controller, and many others. | 
| SMBIOS | System Management BIOS | 
| SMM | System Management Mode | 
| SSDT | Secondary System Description Table | 
| T-RAM | Temporary RAM (memory used before permanent memory is initialized such as CAR) | 
| TPM | Trusted Platform Module | 
| UEFI | Unified Extensible Firmware Interface | 
| UPD | Updatable Product Data | 
| XSDT | Extended System Description Table |