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Discussion: File Extensions Brief Introduction

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Enrique Chang
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Enrique Chang:25. November 0:41

What is the purpose of a filename extension?
The primary purpose of a filename extension is to inform both users and computer systems about the nature of the file's content. This allows the operating system to associate specific programs with specific file types, facilitating seamless user interaction.

When a user clicks on a file, the system refers to its filename extension to determine which application should be used to open it. Without extensions, file handling would be considerably more complex, as the operating system would have to analyze each file's internal structure to determine its type.

File extension common examples
Maybe you know .jpg .doc .xls..., how about other computer file extensions? File extensions span a wide range of categories, reflecting various file formats. Here are some common examples:

Document files: .docx (Microsoft Word), .pdf (Portable Document Format), .txt (Plain Text)
Spreadsheet files: .xls (Microsoft Excel), .csv (Comma-separated values), .ods (OpenDocument Spreadsheet)
Image files: .jpg or .jpeg (JPEG image), .png (Portable Network Graphics), .gif (Graphics Interchange Format), .raw (Photoshop raw file), .tiff (Tagged Image file format)
Audio files: .mp3 (MPEG Layer 3 Audio), .wav (Waveform Audio), .flac (Free Lossless Audio Codec)
Video files: .mp4 (MPEG-4 Video), .avi (Audio Video Interleave), .mkv (Matroska Video)
Compressed files: .zip (Compressed Archive), .rar (Roshal Archive), .7z (7-Zip Archive)
Executable files: .exe (Windows Executable), .bat (Batch File), .sh (Shell Script)

 
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25. November 0:41
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