A (disambiguation)

A is the first letter of the Latin and English alphabet.

A may also refer to:

Science and technology

Mathematics and logic

• A numerical digit meaning ten in hexadecimal and other positional numeral systems with a radix of 11 or greater
• Sometimes in blackboard bold represents the algebraic numbers (${\displaystyle \mathbb {A} }$) (U+1D538 in Unicode)
• Universal quantifier in symbolic logic (symbol ∀ or ${\displaystyle \forall }$, an inverted letter A)
• Universal affirmative, one of the four types of categorical proposition in logic
• Mills' constant is represented by the symbol A
• Glaisher–Kinkelin constant is also often represented by the symbol A

Arts and media

Music

Performers

• A (band), a British alternative rock band

Other media

• `/a/`, the anime and manga section on 4chan

Linguistics

Letters

• A (or a), the first letter of the Latin alphabet
• A (Bengali), the romanized name of the Bengali letter অ
• A (cuneiform), the romanized name of a cuneiform sign
• A (Cyrillic) (A or а), the first letter of the Cyrillic alphabet
• A (kana) (or a), the romanized name of the Hiragana syllable letter あ and of the Katakana syllable letter ア used in Japanese, which may also be used to represent Asia
• Alpha (Α or α), the first letter of the Greek alphabet

Transport

Automobile

• Ford Model A, a name used by two separate cars produced by the Ford Motor Company: