There are 4 other file types using
the AA file extension!

aa file icon.aa - Audible audio

aa file icon.aa - Generic multi-volume CD image file

aa file icon.aa - Prognosis Automated Analyst document file

aa file icon.aa - Unix File

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AA file extension - PAML data file

What is aa file? How to open aa files?

File type specification:

Various data file type icon Various data file type

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.

The default software associated to aa file type:

PAML icon

PAML  Microsoft Windows software

Company or developer:
  Ziheng Yang

PAML (Phylogenetic Analysis by Maximum Likelihood) is package of applications used to phylogenetic analysis of DNA or protein sequences.

Help how to open AA files:

Due the variability and uncertainty of this file type group, there is no general information available, about how to open this various data file format. However most files with extension from this group are usually not meant to be opened or viewed directly. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.

For general information try to look at:
Identifying unknown file formats

How to convert file with extension AA:

Due the variability and uncertainty of this file type group, there is no general information available, about how to convert this various data file format. However most files with extension from this group are usually not in formats, which can be converted. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.

List of recommended software applications associated to the .aa file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open aa file, edit aa file, convert aa file, view aa file, play aa file etc. (if exist software for corresponding action in File-Extensions.org's database).

  • Others aa file

Unspecified and all other actions for computer programs working with aa file - PAML data file

Click on the software link for more information about PAML. PAML uses aa file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft Windows:

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