Appendix C Glossary
The following table defines terms used in this document. See the glossary in the UEFI Specification for definitions of additional terms.

Table 49-Definitions of terms

Term
Definition
''
Element of an enumeration. Type INTN.
ACPI
Advanced Configuration and Power Interface.
ANSI
American National Standards Institute.
API
Application programming interface.
ASCII
American Standard Code for Information Interchange.
ATAPI
Advanced Technology Attachment Packet Interface.
BAR
Base Address Register.
BBS
BIOS Boot Specification.
BC
Base Code.
BEV
Bootstrap Entry Vector. A pointer that points to code inside an option ROM that directly loads an OS.
BIOS
Basic input/output system.
BIS
Boot Integrity Services.
BM
Boot manager.
BOOLEAN
Logical Boolean. 1-byte value containing a 0 for FALSE or a 1 for TRUE. Other values are undefined.
BOT
Bulk-Only Transport.
BS
EFI boot services table or EFI Boot Service(s).
CBI
Control/Bulk/Interrupt Transport.
CBW
Command Block Wrapper.
CHAR16
2-byte character. Unless otherwise specified, all strings are stored in the UTF-16 encoding format as defined by Unicode 2.1 and ISO/IEC 10646 standards.