Address Book File
General Information
| Title | ADR File Extension |
| Extension | .adr |
| Full Form | Address Book File |
| File Type | Data File |
| Developer | Various |
| MIME Type | application/octet-stream |
File Function
| Primary Function | Store addresses |
| Additional Functions | Email client integration |
| Features | Contact management |
File Characteristics
| Quality | Plain text, structured |
| Supports Layers | No |
| Supports Transparency | No |
| Editable | Yes, with text editor |
Use Cases
| Email Storage | Yes |
| Contact Management | Yes |
| Data Import/Export | Yes |
Security and Practices
| Security Risks | Data leakage |
| Best Practices | Encryption, backups |
Historical/Version Information
| Initial Release | Varies by application |
| Latest Version | Depends on software |
Associated Types
| Similar Extensions | .mab, .pst, .vcf |
Software Compatibility
| Software | Usage Policy | OS Compatibility |
|---|---|---|
 Opera Mail |
Free | Windows, Mac, Linux |
 Netscape Messenger |
Discontinued | Windows, Mac, Linux |