| A2A | A2B | A2C | Abilene | Abramson, Norman | ACAP | Accessibility | Account | ACP | Acronym | Action Sheet | ActiveX | ActiveX Control | Ad | Ad-hoc Modus | Ad Click | Ad Click Rate | Address Munging | Ad Game | Administrator | admin-c | ADO | Adobe Systems Inc. | Ad Server | ADSL | ADSL light | ADSL-Modem | Adult Check | Ad View | A/D-Wandler | Adware | AES | Affiliate Program | AfriNIC | Agent | AIM | AIML | ALG | Alias | Aloha | Alohanet | Amaya | AML | Analog | Anchor | Anfangsseite | Animated GIF | Animation | Anon-Proxy | Anonymisierer | Anonymous FTP | Anschluss | ANSI | Antispam-Filter | Anycast | AO/DI | AOL | AP | Apache Server | API | APNIC | AppleTalk | Archie | ARCnet | ARIN | ARP | ARPA | ARPANET | ARQ | AS | ASCII | ASCII Armor | ASCII-Tabelle | ASF | ASN.1 | ASP | ASP | ASP | Asymmetrische Verschlüsselungsverfahren | AT-Befehlssatz | At Large Membership | ATM | Attachment | ATU-C | ATU-R | AUI | Auszeichnungssprache | Authenticode | Authentifizierung | AutoComplete | Avatar | Award