British fishing port registration for Aberdeen
• Physics , symbol for absolute (temperature)
• (ital.) Physics , symbol for absorbance
• Cards , symbol for ace
• Chem. , symbol for acid-catalysed reaction
• (ital.) Chem. , symbol for activity
• Biochem. , symbol for adenine
• Biochem. , symbol for adenosine
• Films adult (former certification)
• Education Advanced (in A level )
• (ital.) Chem. , symbol for affinity
• symbol for ammeter (in circuit diagrams)
• Physics , symbol for ampere(s)
• Physics , symbol for ampere-turn
• Botany , symbol for androecium (in a floral formula)
• anode
• (ital.) Maths. , symbol for area
• symbol for an arterial road (as in A1 , A40 , etc.)
• assault (in A-day )
• atom(ic) (as in A-bomb )
• austral (former monetary unit of Argentina)
• international vehicle registration for Austria
• avancer (French: go faster; on a clock or watch regulator)
• (ital.) Chem. , symbol for Helmholtz function
• (bold ital.) Physics , symbol for magnetic vector potential
• Physics , symbol for mass number
• (ital.) Physics , symbol for nucleon number
• (ital.) Electronics , symbol for Richardson constant
• symbol for ten (in hexadecimal notation)
• Med. , indicating a blood group or its associated antigen (see also under ABO)
• Education , indicating the highest mark or grade for work
• indicating managerial, professional (occupational grade)
• indicating a musical note or key
• Astronomy , indicating a spectral type
• indicating a standard paper size (see under A0–A10)
• Logic , indicating a universal affirmative categorical proposition