Skip to content

Apple AddressBook archive file definition and linked programs information.

 

How to open ABBU files

 

File extension abbu is used by following file type(s):

file type description:
Apple AddressBook archive file
Archive file used by Apple AddressBook and stores user contacts. AddressBook application is integrated in MAC OS X.
Related programs
that open abbu files:
Mac OS X, AddressBook

Audible enhanced audio file definition and linked programs information.

 

How to open AAX Files

 

File extension aax is used by following file type(s):

file type description:
Audible enhanced audio file
The AAX file extension is used for a proprietary audio book format used by Audible, an Internet provider of spoken audio entertainment, information, and educational programming. The company sells digital audiobooks, radio and TV programs, and audio versions of magazines and newspapers. It is owned by Amazon.

AAX format  is the enhanced version of AA format and represents highest quality audio format for audio books.

Many current devices support AAX file format, with notable being Apple's iPods, Microsoft Zune, Creative Zen, Amazon Kinde and other.

Programs
that open aax files:
Amazon Kindle (other devices) (Windows Phone/Metro)
Apple iTunes for Mac (Apple OS X)
Apple iTunes for Windows (Microsoft Windows)

Ad-Aware definitions file definition and linked programs information.

 

How to open AAWDEF files

File extension aawdef is used by following file type(s):

aawdef file type description:
Ad-Aware definitions file
AAWDEF file suffix is associated with Ad-Aware. File contains new data about malicious software (adware and spyware) for Ad-Aware.
Programs
that open aawdef files:
Ad-Aware PRO (Microsoft Windows)

Advanced audio coding file definition and linked programs information.

 

How to open AAC Files

 

File extension aac is used by following file type(s):

file type description:
Default file extension for .aac file type:
Advanced audio coding file
Advanced Audio Coding (AAC) format

Advanced Audio Coding (AAC) is a lossy digital audio compression format. Because of its exceptional performance and quality, AAC is at the core of the MPEG-4, 3GPP and 3GPP2 specifications and is the audio codec of choice for Internet, wireless and digital broadcast arenas.

AAC was designed as an improved-performance codec relative to MP3 (which was specified in MPEG-1 and MPEG-2) by the ISO/IEC in 11172-3 and 13818-3.

AAC provides audio encoding that compresses much more efficiently than older formats, such as MP3 or OGG, yet delivers quality rivaling that of uncompressed CD audio.

Features of AAC format
AAC was promoted as the successor to MP3 for audio coding at medium to high bitrates. When compared side-by-side, AAC proves itself worthy of replacing MP3 as the new Internet audio standard the advantages over MP3 are:

  • Improved compression provides higher-quality results with smaller file sizes.
  • Support for multichannel audio, providing up to 48 full frequency channels.
  • Higher resolution audio, yielding sampling rates up to 96 kHz.
  • Improved decoding efficiency, requiring less processing power for decode.

History of AAC

Advanced Audio Coding was developed with the cooperation and contributions of companies mainly including Dolby, Fraunhofer (FhG), AT&T, Sony and Nokia, and was officially declared an international standard by the Moving Pictures Experts Group in April of 1997.

AAC was written into specification as Part 7 of the MPEG-2 standard, and again into Part 3 of the MPEG-4 standard. As such, AAC can be referred to as MPEG-2 Part 7 and MPEG-4 Part 3 depending on its implementation, but is most often referred to as MPEG-4 AAC, or AAC for short.

However, MP4 usually refers to the format described in MPEG-4 Part 14, which is a container format for carriage of video and audio data.

Programs
that open aac files:
Adobe Soundbooth (Microsoft Windows)
Agree MP3 to Ringtone Converter (Microsoft Windows)
Aimersoft DRM Media Converter for Windows (Microsoft Windows)
Aimersoft DVD Ripper for Mac (Apple OS X)
Aimersoft Video Converter for Mac (Apple OS X)
ALLPlayer (Microsoft Windows)
Any Audio Converter (Microsoft Windows)
Apple iTunes for Mac (Apple OS X)
Apple iTunes for Windows (Microsoft Windows)
Apple QuickTime (Microsoft Windows)
Audacity (Microsoft Windows)
DVD Ripper+Video Converter Ultimate (Microsoft Windows)
Foobar2000 (Microsoft Windows)
FormatFactory (Microsoft Windows)
Free Mp3 Wma Converter (Microsoft Windows)
Freemake Video Converter (Microsoft Windows)
ImTOO DPG Converter (Microsoft Windows)
MediaCoder (Microsoft Windows)
MediaMonkey (Microsoft Windows)
Microsoft Windows Media Player (Microsoft Windows)
Movavi Audio Suite Personal (Microsoft Windows)
Movavi DVD Ripper for Mac (Apple OS X)
MPlayer (Microsoft Windows)
MPlayer for Linux (Linux)
MPlayer for Mac (Apple OS X)
Play (Apple OS X)
RealPlayer (Microsoft Windows)
Roxio Toast Titanium (Apple OS X)
Ultimate Video Converter (Microsoft Windows)
USB Flash Drive for iOS (iOS)
VLC media player (Microsoft Windows)
VLC media player for Linux (Linux)
VLC media player for Mac (Apple OS X)
Winamp (Microsoft Windows)
Xilisoft iPod Rip (Microsoft Windows)
Xilisoft Video Converter (Microsoft Windows)
Xine (Linux)
xrecode (Microsoft Windows)

Audible Audio file definition and 5 other file types and linked programs information.

 

How to open AA Files

File extension aa is used by following file type(s):

file type 1 description:
Audible Audio file
The AA file extension is used for a proprietary audio book format used by Audible, an Internet provider of spoken audio entertainment, information, and educational programming. The company sells digital audiobooks, radio and TV programs, and audio versions of magazines and newspapers. It is owned by Amazon.

This format comes in several versions with latest being 3 and 4. It is often DRM protected.

Many current devices support AA file format, with notable being Apple's iPods, Microsoft Zune, Creative Zen, Amazon Kinde and other.

MIME: audio/audible, audio/x-pn-audibleaudio

Programs
that open aa files:
Amazon Kindle (other devices) (Windows Phone/Metro)
Amazon Kindle for Android (Google Android)
Amazon Kindle for BlackBerry (Blackberry)
Amazon Kindle for iPhone (iOS)
Amazon Kindle for Mac (Apple OS X)
Amazon Kindle for PC (Microsoft Windows)
Amazon Kindle for Windows Phone 7
Apple iTunes for Mac (Apple OS X)
Apple iTunes for Windows (Microsoft Windows)
Audible Manager (multiplatform software)
AudibleAir (Microsoft Windows)
AudiblePlayer (multiplatform software)
DRM Convertor (Microsoft Windows)
Nero ShowTime (Microsoft Windows)

 

 file type 2 description:
Generic multi-volume CD image file
The AA file extension is very rarely used for Generic ISO multi volume image files. ISO buster can open them.

However vast majority of .aa found are Audible audio books.

Programs
that open aa files:
ISOBuster (Microsoft Windows)

 

file type 3 description:
PAML data file
The AA file extension is associated with the PAML (Phylogenetic Analysis by Maximum Likelihood) and used for some its data files.

PAML is a package of programs for phylogenetic analyses of DNA or protein sequences using maximum likelihood. It is maintained and distributed for academic use free of charge by Ziheng Yang.

However vast majority of .aa found are Audible audio books.

Programs
that open aa files:
PAML (multiplatform software)

 

file type 4 description:
Prognosis Automated Analyst document file
The AA file extension was also used by Prognosis Automated Analyst for its default document format. Most likely obsolete file format.

However vast majority of .aa found are Audible audio books.

Programs
that open aa files:
PROGNOSIS (Microsoft Windows)

 

file type 5 description:
Unix File
this file fix a loop or other syntax error
Programs
that open aa files:
Unix (Linux)

Split Multi-volume ARJ compressed file archive (part 7) definition and 2 other file types and linked programs information.

 

File extension a05 is used by following file type(s):

file type 1 description:
Default file extension for .a05 file type:
Split Multi-volume ARJ compressed file archive (part 7)
The A05 file extension is associated with ARJ. Its one part of a multi-volume compressed ARJ archive.

ARJ file extension is used for the native format of ARJ archiver. ARJ is a file archiver that compresses files into a disk space saving archive. It is fast, reliable, and has a rich set of features which include Windows 9x, Millenium long filename support, file version management, data damage protection, ANSI escape sequence display handler, configurable command options, multiple volume archives (archives that span diskettes) and much more.

Some ARJ files can be parts of a multi-volume sequences. In ARJ you can split a huge archive to a few smaller files, which are called volumes.

ARJ archiver does use the following sequence:

  • .arj for first volume
  • .a00, a01, a02 .... etc. for any additional volumes

In order to unpack the multi-volume ARJ archive, you need to place ALL of the split parts in the same directory and start extraction of the first volume (.arj). The program will automatically use all of the parts to extract the content of the archive.

 

Programs
that open a05 files:
7-zip (Microsoft Windows)
ARJ (MS-DOS)
ARJ32 (Microsoft Windows)
WinRAR (Microsoft Windows)
WinZip (Microsoft Windows)
ZipZag (Microsoft Windows)

 

file type 2 description:
Split Multi-volume ALZip compressed file archive (part 7)
The A05 file suffix is associated with the ALZip. It is one part of a multi-volume compressed ALZ archive.
Programs
that open a05 files:
ALZip (Microsoft Windows)

Split Multi-volume ARJ compressed file archive (part 3) definition and 3 other file types and linked programs information.

 

File extension a01 is used by following file type(s):

file type 1 description:
Default file extension for .a01 file type:
Split Multi-volume ARJ compressed file archive (part 3)
The A01 file extension is associated with ARJ, once very popular archiving program for MS-DOS. An *.a01 file is one part of a multi-volume compressed ARJ archive.

ARJ file extension is used for the native format of ARJ archiver. ARJ is a file archiver that compresses files into a disk space saving archive. It is fast, reliable, and has a rich set of features which include Windows 9x, Millenium long filename support, file version management, data damage protection, ANSI escape sequence display handler, configurable command options, multiple volume archives (archives that span diskettes) and much more.

Some ARJ files can be parts of a multi-volume sequences. In ARJ you can split a huge archive to a few smaller files, which are called volumes.

ARJ archiver does use the following sequence:

  • .arj for first volume
  • .a00, a01, a02 .... etc. for any additional volumes

In order to unpack the multi-volume ARJ archive, you need to place ALL of the split parts in the same directory and start extraction of the first volume (.arj). The program will automatically use all of the parts to extract the content of the archive.

Programs
that open a01 files:
7-zip (Microsoft Windows)
ARJ (MS-DOS)
ARJ32 (Microsoft Windows)
WinRAR (Microsoft Windows)
WinZip (Microsoft Windows)
ZipZag (Microsoft Windows)

 

file type 2 description:
Archive Segment (part 1)
Some programs are distributed as segmented archives. Some of these use this extension with an associated .EXE file that you run to combine the segments to get the full archive.

 

file type 3 description:
Split Multi-volume ALZip compressed file archive (part 3)
The A01 file suffix is associated with the ALZip. It is one part of a multi-volume compressed ALZ archive.
Programs
that open a01 files:
ALZip (Microsoft Windows)

Ada programming language source code file definition and 8 other file types and linked programs information.

 

How to Open A Files

 

File extension a is used by following file type(s):

 type 1 description:
Ada programming language source code file
The A file extension is associated with Ada, is a structured, statically typed, imperative, and object-oriented high-level computer programming language based on Pascal.

It was originally designed by a team led by Jean Ichbiah of CII Honeywell Bull under contract to the United States Department of Defense during 1977–1983 to supersede the hundreds of programming languages then used by the US Department of Defense (DoD).

Ada is strongly typed and compilers are validated for reliability in mission-critical applications, such as avionics software. Ada is an international standard, the current version (known as Ada 2005) is defined by joint ISO/ANSI standard.

 

 type 2 description:
Alpha Channel image data
The Alpha Channel is this nifty storage area in your image's file for non-visible picture elements. Think of it as your picture's own little private utility closet/filing cabinet.

The .psp picture file has these extra goodies stored in its Alpha channel that can just travel around with the picture (unseen until you need them) as a part of the file.

Major items of interest that get stored in the Alpha Channel are Selections, Masks and Creator Information. We can save this stuff to the Alpha channel and then dig it back out later to reuse for editing that picture or using in our other images.

 

 type 3 description:
Archive file
Archive file - Red Hat Linux
Programs
that open a files:
Linux operating systems (Linux)

 

type 4 description:
Assembly source code
An assembly language is a low-level language for programming computers. It implements a symbolic representation of the numeric machine codes and other constants needed to program a particular CPU architecture. This representation is usually defined by the hardware manufacturer, and is based on abbreviations (called mnemonics) that help the programmer remember individual instructions, registers, etc. An assembly language is thus specific to a certain physical or virtual computer architecture (as opposed to most high-level languages, which are usually portable).

Assembly languages were first developed in the 1950s, when they were referred to as second generation programming languages. They eliminated much of the error-prone and time-consuming first-generation programming needed with the earliest computers, freeing the programmer from tedium such as remembering numeric codes and calculating addresses. They were once widely used for all sorts of programming. However, by the 1980s (1990s on small computers), their use had largely been supplanted by high-level languages, in the search for improved programming productivity. Today, assembly language is used primarily for direct hardware manipulation, access to specialized processor instructions, or to address critical performance issues. Typical uses are device drivers, low-level embedded systems, and real-time systems.

A utility program called an assembler is used to translate assembly language statements into the target computer's machine code.

The assembler performs a more or less isomorphic translation (a one-to-one mapping) from mnemonic statements into machine instructions and data. (This is in contrast with high-level languages, in which a single statement generally results in many machine instructions.

A compiler, analogous to an assembler, is used to translate high-level language statements into machine code; or an interpreter executes statements directly.)

Many sophisticated assemblers offer additional mechanisms to facilitate program development, control the assembly process, and aid debugging.

In particular, most modern assemblers (although many have been available for more than 40 years already) include a macro facility (described below), and are called macro assemblers.

 

type 5 description:
Free Pascal file
Archive file for Linux or DOS Version.
Programs
that open a files:
Free Pascal (multiplatform software)

 

type 6 description:
Hellhog XP game archive
Game archive contains game files (maps, graphics, music, sounds, textures) for Hellhog XP.
Programs
that open a files:
Dragon UnPACKer (Microsoft Windows)
Hellhog XP (Microsoft Windows)

 

type 7 description:
Jabbim (Jabber client) file
File extension used by Jabbim, application for chat through Jabber protocol.

Jabber is an open instant messaging technology that anyone can use. The Jabber community runs a worldwide network of free IM services and has created plenty of free software that you can download -- clients for every device and operating system, servers you can run at your organization, and libraries you can use to build your own Jabber applications.

Programs
that open a file:
Jabbim (Microsoft Windows)

 

type 8 description:
Static Object Code Library
The a file extension is associated with static object code library files in UNIX. A static library is basically a set of object files that were copied into a single file. This single file is the static library.
Programs
that open a file in linux:
Unix (Linux)

Active Server Page Extended ASP.NET script file definition and linked programs information.

How to open ASPX Files

 

File extension aspx is used by following type(s):

type description:
Default  extension for .aspx type:
Active Server Page Extended ASP.NET script files
The .NET pages, known also as as web forms, are the main building block for application development. The Web forms are contained in files with an .aspx extension.

These files contain static (X)HTML markup, as well as markup defining server-side Web Controls and User Controls where the developers place all the required static and dynamic content for the web page.

The ASPX extension is used for files that are of the Active Server Page Extended format. These are internet webpages which are made using ActiveX scripting, and which are based on the Microsoft ASP.NET programming framework.

These webpages are generated by Internet servers. The ASP code is created by the Internet server, and then is interpreted as HTML by the web browser.

The native application, that uses ASPX script is ASP.NET server (mainly Microsoft IIS - Internet Information Server).

ASPX scripts files can be written in Microsoft Visual Studio and WWW pages, that are written in ASP.NET and used ASP.NET, can be viewed in Internet browser such as Internet Explorer, Firefox, Opera, Chrome.

Programs
that open aspx files:
Adobe Contribute (Microsoft Windows)
Adobe Creative Suite (Microsoft Windows)
Adobe Creative Suite for Mac (Apple OS X)
Adobe Dreamweaver (Microsoft Windows)
Adobe Dreamweaver for Mac (Apple OS X)
ASP.NET (Microsoft Windows)
ASP.NET Visual Designer (Linux)
Chromium for Linux (Linux)
Firefox (Microsoft Windows)
Firefox for Linux (Linux)
Firefox for Mac (Apple OS X)
gedit (Linux)
GNU Emacs (Linux)
Google Chrome (Microsoft Windows)
Google Chrome for Mac (Apple OS X)
Konqueror (Linux)
Microsoft Expression Web (Microsoft Windows)
Microsoft Internet Explorer
Microsoft Internet Information Services (Microsoft Windows)
Microsoft Visual Studio
Microsoft Windows NotePad
Mono for Linux (Linux)
Mono for Mac (Apple OS X)
NotePad++ text editor (Microsoft Windows)
Nvu (Microsoft Windows)
Opera browser (Microsoft Windows)
Opera browser for Linux (Linux)
Opera browser for Mac (Apple OS X)
Safari (Apple OS X)
Safari for Microsoft Windows (Microsoft Windows)
TextEdit (Apple OS X)

Adobe Illustrator graphics file definition and 8 other types and linked programs information.

 

How to open ai file

 

File extension ai is used by following type(s):

Type 1 description:
Default file extension for .ai file type:
Adobe Illustrator graphics file
AI file suffix is related to vector graphic files created in Adobe Illustrator.
Programs
that open ai files:
Adobe Fireworks (Microsoft Windows)
Adobe Fireworks for Mac (Apple OS X)
Adobe Flash (Microsoft Windows)
Adobe Flash Catalyst (Microsoft Windows)
Adobe Flash Catalyst for Mac (Apple OS X)
Adobe Flash for Mac (Apple OS X)
Adobe Illustrator (Microsoft Windows)
Adobe Illustrator for Mac (Apple OS X)
Adobe Photoshop (Microsoft Windows)
CorelDraw Graphics Suite (Microsoft Windows)
Microsoft Expression Design (Microsoft Windows)
Preview (Apple OS X)
XnView (multiplatform software)

 

Type 2 description:
Advantage Database Server files
File extension AI is related to Advantage Database Server application.
Programs
that open ai files:
Advantage Database Server (Microsoft Windows)

 

Type 3 description:
AIwin project files
Project file created and used by AIwin.
Programs
that open ai files:
AIwin (Microsoft Windows)

 

Type 4 description:
Corel Trace drawing files
Drawing file created and used by Corel Trace.
Programs
that open ai files:
Corel Trace (Microsoft Windows)

 

Type 5 description:
EARS component files
EARS = UK Liberal Democrats Election Agents Record System, probably specialized software.

 

Type 6 description:
Mopac Internal chemical modeller output files
MOPAC (Molecular Orbital PACkage) is a semiempirical quantum chemistry program based on Dewar and Thiel's NDDO approximation. MOPAC was started in 1981, and has been under continuous development since then.

 

Type 7 description:
Progress database after image files
File used by Progress database applications.
Programs
that open ai files:
Progress ObjectStore (Microsoft Windows)

 

Type 8 description:
Rise of Nations game files
File extension AI is related to the PC game Rise of Nations.
Programs
that open ai files:
Rise of Nations (Microsoft Windows)

Other free download options:

Open source software to download for free