Communication
Articles about communication systems, signals and exchange of information.
112 (emergency telephone number)
988 Suicide & Crisis Lifeline
Å
Å — the Scandinavian letter A with a ring
A (Cyrillic)
Abbreviation
Abbreviation: forms, uses, and how it differs from acronyms
Abenaki language
Abjad
Abjad: consonant-based writing systems
Abkhaz language
Abugida
Abugida (alphasyllabary)
Accent
Accent — regional and personal patterns of pronunciation
Acronym
Acronym: definition, types, history and usage
Acute accent
Address
Address (contact identifier and location descriptor)
Adyghe language
Adyghe language (Adygebze) — Circassian language of the Northwest Caucasus
Afar language
Afar language (Qafaraf) — an East Cushitic language of the Horn of Africa
Affricate
African-American Vernacular English
Afrikaans
Afrikaans: origin, features, and contemporary role
Afroasiatic languages
Afroasiatic languages: overview, branches, history and modern role
Aimaq dialect
Aimaq dialect (Persian ethnolect)
Air gap (networking)
Air-ground radiotelephone service
Air–Ground Radiotelephone Service
Ajam
Ajam (Arabic term for non‑Arabic speaker and its historical meanings)
Akkadian language
Alarm
Albanian language
Albanian language (Shqip): overview, history, dialects and usage
Albanian (Shqip) is an Indo-European language forming its own branch. Spoken in Albania, Kosovo and surrounding regions, it has two main dialects, a Latin-based alphabet, and a ric
Alemannic German
Alice and Bob
Alice and Bob: Placeholders for Parties in Science and Security
Alphabet
Alphabet: systems of written letters and their roles
An alphabet is a standardized set of letters used to represent spoken language. This article explains what alphabets are, how they differ from other scripts, their history, structu
Alveolar consonant
Amateur radio
Amateur radio (ham radio): hobby, technology, and public service
Amber alert
AMBER Alert (child abduction emergency broadcast system)
American English
American Sign Language
American Sign Language (ASL): Overview, History, Grammar, and Use
Amharic language
Amplitude modulation
Analog signal
Anglicisation
Anglo-Frisian languages
Anglo-Norman language
AP
AP: common meanings, origins, and uses
Aragonese language
Aragonese language (Aragonés)
Aramaic language
ARCNET
Area code 242
Area code 268
Area code 268 (Antigua and Barbuda)