• A grass also called esparto.
• ALFA (rowing), an international indoor rowing competition in Estonia
• Alfa (Lebanon), a Lebanese telecom company
• ALFA (Mexico), a Mexican industrial conglomerate
• Alfa (title), a title in Guinea
• Alfa (rocket), the designation of an Italian program for the development of efficient solid-propellant rockets
• Alfa Aesar, a Chemical catalogue company owned by Johnson Matthey, who originally traded elements under the Alfa label.
• Alfa-Bank, the Alfa Group corporate treasury, the largest private commercial bank in Russia
• Alfa Brewery, a family owned independent brewery located in the Netherlands.
• Alfa Cable Television, a cable television company in Tirana, Albania
• Alfa Group Consortium, one of Russia's largest privately owned financial-industrial conglomerates
• Alfa class submarine, NATO reporting name for Soviet Union/Russian Navy Project 705 submarine class of hunter/killer nuclear powered vessels
• Alfa Laval AB, a Swedish company,
• Alfa Matrix, a Belgian record label.
• Alfa Pendular, the pendolino high-speed train of Portuguese state railway company CP
• Alfa Retailindo, a retail company from Indonesia, partially owned by Carrefour
• Alfa Romeo, an Italian automobile manufacturer
• Alfa TV, a premium television service available in Cyprus
• Flugschule Wings Alfa, a hang glider
• Isaac Alfa, a retired Nigerian Air Force officer
• The usual spelling for the code word for the letter "A" in the NATO phonetic alphabet.

• den Buchstaben A in den Buchstabiertafeln der zivilen Luftfahrt und der NATO
• Alfa Group, ein russischer Industrie- und Finanzkonzern
• Grupo Alfa, einen Industriekonzern aus Mexiko
• Alfa-Klasse, eine Klasse russischer Jagd-U-Boote einer bestimmten
• Alfa (Rakete), ein italienisches Raketenprojekt
• Alfa Romeo, Kurzform der Automarke
• Alfa, eine niederländische Brauerei

• Stefano Delle Chiaie,

W języku starogreckim i grece współczesnej alfa reprezentuje samogłoskę otwartą przednią niezaokrągloną /a/.

Alfa może symbolizować początek czegoś. "Apokalipsa Świętego Jana" zawiera tekst Jezusa Chrystusa, który deklaruje, że będzie "alfą i omegą, początkiem i końcem, pierwszym i ostatnim" (Apokalipsa Świętego Jana, 22:13, KJV).