API ανίχνευσης ιών (VSAPI)
API διακομιστή Internet
APM
APN
A Portuguesa
A Posteriori
APPC
Apple
Apple I
Apple Macintosh
AppleTalk
APPN
Apuliios
Aqua
Ar
Arabesque
Arad
Arcana
archailogos
archangeloi
Archosauria
arcsec
ARD
ARF
Arges
Arkia
arktos
Armstrong Whitworth Atlas
ARP
ARP cache
ARS
Arte
Art Nouveau
Art of Life
Aruba Dushi Tera
ASBR
ASCII
ASEAN
ASIN
Asklípios
Aspergillus fumigatus
ASPM
ASP.NET
ASR
Association of National Advertisers, Inc. (Εθνική ένωση διαφημιζόμενων)
Asymmetric Digital Subscriber Line
ataraksia
Athina
Athiná or Athīna
ATIA
ελληνικά