| File Extension: | ATV |
| File Type Description: | ACT! Data File |
| File Type Developer: | Sage |
| Primary Associated Software: | Act! |
| Primary Software Developer: | Swiftpage, Inc. |
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ACT! Data File files are the most popular type of files to carry the ATV file extension, originally developed by Swiftpage, Inc. for Act!. Website visitor analysis indicates that ATV files are commonly found on Windows 10 user machines, and are most popular in United States. Most of these users are running the Google Chrome web browser.
 | Act! by Swiftpage, Inc. |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .ADF | Cloanto Corporation | Disk Image Files | Amiga Disk File |
| .FPT | Sage | Database Files | ACT! Data File |
| .HDB | HansaWorld | Database Files | HansaWorld Database File |
| .HK5 | Swiftpage, Inc. | Database Files | ACT! Database File |
| .REL | Nintendo | Game Files | Relocatable Module File |
| .GDB | Garmin | Database Files | GPS Database File |
| .PAD | Swiftpage, Inc. | Uncommon Files | ACT! Database Pointer File |
| .LCS | Swiftpage, Inc. | Data Files | ACT! History Data |
| .REX | Propellerhead | Audio Files | ReCycle Loop File |
| .MAF | National Cancer Institute | Data Files | Mutation Annotation Format File |
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