# Appendix L. Acronyms

This is a list of acronyms commonly used in the PostgreSQL documentation and in discussions about PostgreSQL.

ANSI

American National Standards Institute (opens new window)

API

Application Programming Interface (opens new window)

ASCII

American Standard Code for Information Interchange (opens new window)

BKI

Backend Interface

CA

Certificate Authority (opens new window)

CIDR

Classless Inter-Domain Routing (opens new window)

CPAN

Comprehensive Perl Archive Network (opens new window)

CRL

Certificate Revocation List (opens new window)

CSV

Comma Separated Values (opens new window)

CTE

Common Table Expression

CVE

Common Vulnerabilities and Exposures (opens new window)

DBA

Database Administrator (opens new window)

DBI

Database Interface (Perl) (opens new window)

DBMS

Database Management System (opens new window)

DDL

Data Definition Language (opens new window), SQL commands such as CREATE TABLE, ALTER USER

DML

Data Manipulation Language (opens new window), SQL commands such as INSERT, UPDATE, DELETE

DST

Daylight Saving Time (opens new window)

ECPG

Embedded C for PostgreSQL

ESQL

Embedded SQL (opens new window)

FAQ

Frequently Asked Questions (opens new window)

FSM

Free Space Map

GEQO

Genetic Query Optimizer

GIN

Generalized Inverted Index

GiST

Generalized Search Tree

Git

Git (opens new window)

GMT

Greenwich Mean Time (opens new window)

GSSAPI

Generic Security Services Application Programming Interface (opens new window)

GUC

Grand Unified Configuration, the PostgreSQL subsystem that handles server configuration

HBA

Host-Based Authentication

HOT

Heap-Only Tuples (opens new window)

IEC

International Electrotechnical Commission (opens new window)

IEEE

Institute of Electrical and Electronics Engineers (opens new window)

IPC

Inter-Process Communication (opens new window)

ISO

International Organization for Standardization (opens new window)

ISSN

International Standard Serial Number (opens new window)

JDBC

Java Database Connectivity (opens new window)

JIT

Just-in-Time compilation (opens new window)

JSON

JavaScript Object Notation (opens new window)

LDAP

Lightweight Directory Access Protocol (opens new window)

LSN

Log Sequence Number, see pg_lsn and WAL Internals.

MITM

Man-in-the-middle attack (opens new window)

MSVC

Microsoft Visual C (opens new window)

MVCC

Multi-Version Concurrency Control

NLS

National Language Support (opens new window)

ODBC

Open Database Connectivity (opens new window)

OID

Object Identifier

OLAP

Online Analytical Processing (opens new window)

OLTP

Online Transaction Processing (opens new window)

ORDBMS

Object-Relational Database Management System (opens new window)

PAM

Pluggable Authentication Modules (opens new window)

PGSQL

PostgreSQL

PGXS

PostgreSQL Extension System

PID

Process Identifier (opens new window)

PITR

Point-In-Time Recovery (Continuous Archiving)

PL

Procedural Languages (server-side)

POSIX

Portable Operating System Interface (opens new window)

RDBMS

Relational Database Management System (opens new window)

RFC

Request For Comments (opens new window)

SGML

Standard Generalized Markup Language (opens new window)

SNI

Server Name Indication (opens new window), RFC 6066 (opens new window)

SPI

Server Programming Interface

SP-GiST

Space-Partitioned Generalized Search Tree

SQL

Structured Query Language (opens new window)

SRF

Set-Returning Function

SSH

Secure Shell (opens new window)

SSL

Secure Sockets Layer (opens new window)

SSPI

Security Support Provider Interface (opens new window)

SYSV

Unix System V (opens new window)

TCP/IP

Transmission Control Protocol (TCP) / Internet Protocol (IP) (opens new window)

TID

Tuple Identifier

TLS

Transport Layer Security (opens new window)

TOAST

The Oversized-Attribute Storage Technique

TPC

Transaction Processing Performance Council (opens new window)

URL

Uniform Resource Locator (opens new window)

UTC

Coordinated Universal Time (opens new window)

UTF

Unicode Transformation Format (opens new window)

UTF8

Eight-Bit Unicode Transformation Format (opens new window)

UUID

Universally Unique Identifier

WAL

Write-Ahead Log

XID

Transaction Identifier

XML

Extensible Markup Language (opens new window)