| Format Type | ICO (Windows Icon) |
| Extension | .ico |
| MIME Type | image/vnd.microsoft.icon, image/x-icon |
| Description | File format used for icons in Microsoft Windows |
| Introduced | 1985 (Windows 1.0) |
| Usage | Used for representing icons for applications, files, etc. |
| Image Sizes | 16x16, 32x32, 48x48, 64x64, and larger (up to 256x256) |
| Color Depths | 1-bit (monochrome) and 32-bit (with alpha channel) |
| Transparency | Supports transparency (32-bit icons) |
| Compression | Typically uncompressed or RLE-compressed |
| File Structure | Consists of header, directory, and image data sections |
| Header | Contains information about the file and image count |
| Directory | Lists the offsets and sizes of image entries |
| Image Entries | Contains the actual image data in different sizes |
| Image Formats | BMP, PNG, and JPEG (in newer versions) |
| Platform Support | Windows, some Unix-based systems with libraries |
| Conversion Tools | Various image editors, online converters, command-line tools |
| Use Cases | Icons for desktop applications, files, folders, websites, etc. |
| Icon Libraries | Contain collections of ICO files for reuse |