While searching for an answer to the question - How to open the ABU file? - you probably found websites, which offer software that was able to open any file extension. Do not be fooled, there is no one program that will allow you to work with any file extension, including the ABU file. Each program contains a different type of data and you need specialized software to properly work with the ABU file. Here is a list of programs that are designed to work with the ABU file - remember, these applications are able to open at most a few file extensions, they are designed to work with a specific data type.
| File type | ACT! E-mail Address Book |
| Developer | The Sage Group plc |
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If after installing the program from a list, you still cannot open a file with the ABU extension, the reason may be that the file is damaged. The solution may be to find a new copy of the ABU file you want to open
In this case, the easiest way is to use the tool built into the operating system for association of the ABU file with applications to support it. Double click on the file you cannot open - the operating system will display a list of programs that are likely to work with your ABU file. Choose one of them, or select the location on a disk where you installed one of the applications from our list. Windows should then open the ABU file using the program installed earlier.
Entries containing links of the ABU file extensions with applications is located in the HKEY_CLASSES_ROOT. If you do not know how to get to the Windows Registry, or how to make changes in it, ask a specialist for help. Lack of knowledge on the subject may cause irreversible changes on your computer.
There may be a situation when a computer virus passes itself off as the ABU file. In this case, such a file will definitely not be opened. Download a good antivirus program and scan the ABU file mentioned. If the antivirus application detects malicious data, it may signify that the ABU file is infected.
| ABT | The Arbiter Game Schedule |
| ABS | Absolute Database Single-file Database Format |
| ABZ | Alpha Black Zero Game |
| ABK | Ability Write Backup Format |
| AB2 | Print Shop Address Book File |
| ABBU | Apple Address Book Archive Format |
| ABKPRJ | Ashampoo Burning Studio Backup Project Format |
| ABY | AOL Directory Format |
| ABD | The Bat! Mail Processing System |
| ABA | Palm Address Book Archive Format |
