This document discusses different file formats and extensions used in computer files and operating systems. It provides examples of common file extensions for Microsoft Office files, images, audio, video, Adobe files, fonts, programs and other file types. The extensions help identify the file type and what program can open it. Knowing file extensions is important for identifying computer viruses and understanding file structures.

1. DIFFERENT FILE
FORMAT/EXTENSION
ERWIN MARLON R. SARIO
EDUCATIONAL TECHNOLOGY 2

2. OBJECTIVES:
The learners will be able to know the meaning of computer
files and file format.
The students will be able to identify the different file format
in Windows Operating System.
In connection to teaching, the lesson will provide the
teacher with additional knowledge in computer.
Identifying file format or file types can serve as an
in identifying computer viruses.

3. COMPUTER FILE FORMAT
A file format is the structure of how information is stored
(encoded) in a computer file. File formats are designed to store
specific types of information, such as JPEG and TIFF for image or
raster data, AI (Adobe Illustrator) for vector data, or PDF for
document exchange.
COMPUTER FILE EXTENSION
A file extension or file name extension is the ending of a file
that helps identify the type of file in operating systems such
as Microsoft Windows. In Microsoft Windows, the file name
extension is a period that is often followed by three
characters, but may also be one, two, or four characters long.

4. FILENAME AND FILE EXTENSION

5. MICROSOFT OFFICE 2013 FILE EXTENSION
.docx – Word document
.xlsx – Excel workbook
.pptx – PowerPoint presentation
.ppsx – PowerPoint slideshow

6. COMMON IMAGE FILE EXTENSIONS
.TIFF – Tagged Image File Format
.JPG or .JPEG – Joint Photographic Expert Group
.BMP – Bitmap
.GIF – Graphics Interchange Format
.PNG – Portable Network Graphics

7. COMMON AUDIO FILE EXTENSION
.MP3 – MPEG-2 Audio Layer 3
(Moving Pictures Expert Group)
.OGG- developed by Xiph.org
foundation
.AIFF- Audio Interchange File Format
.WMA- Windows Media Audio
.WAV- Waveform Audio File Format,
WAVE
.MIDI-Musical Instrument Digital
Interface

8. COMMON VIDEO FILE FORMAT
.AVI- Audio Video Interleave
.MPG or .MPEG – Moving Pictures
Expert Group
.FLA – Adobe FLASH Movies
.MKV – developed by
Matroska.org
.FLV- Adobe Flash Video
.MOV- extension for Quicktime
Multimedia File Format

9. COMMON ADOBE FILE FORMAT
.PDF – Portable Document Format
.PSD – Photoshop Document
.SWF – Shockwave Format
.FLA – Flash Video Format

10. OTHER FILE EXTENSIONS
.TTF – True Type Font
.EXE – Executable File
.DLL – Direct Link Library
.SYS – System File
.ICO – Icon File
.LNK – Shortcut

11. .TXT – Text File
.FFH – Unknown File
.LOG – Log File
.HTML – Hypertext Markup Language