File Extension Mini-Lesson

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Presentation transcript:

File Extension Mini-Lesson Computer Applications File Extension Mini-Lesson

Photos .jpg (most common) .gif (graphical interchange file) .png (portable network graphic) .tif (tagged image file) .img (image) .bmp (bitmap) Why it matters: File size Resolution What software will open it

Video .mpg (movie picture experts group) .avi (audio visual interleave) .wmv (windows media video) .flv (flash video) Why it matters: Size What software will play it If ‘codecs’ are needed to decode it

Documents .doc (Word 2003 or older) .docx Word 2007 or newer) .rtf (rich text format) .txt (text only) .pdf (portable data file = Adobe Acrobat) Why it matters: - What software will open it

Music .mp3 .cda .wma Why it matters: - Which devices will play it

Other .xls (Excel 2003 or older) .xlsx (Excel 2007 or newer) .ppt (PowerPoint 2003 or older) .pptx (PowerPoint 2007 or newer) .htm (hypertext markup language) .html (hypertext markup language) .exe (executable…DANGEROUS if you don’t know what it is!) .msi (Microsoft installation file…DANGEROUS if you don’t know what it is!)

Converting Files Some programs like Prism will convert files from one format to another. Some web-based programs like zamzar.com will also convert the file and email you a link to it.

Review Name two kinds of photo file extension Name two kinds of video file extension What kind of file is one that ends in “.ppt”? What kind of software would I need to run a “.xlsx” file? Which file extension is used on iPods? Can files be converted from one format to another? What website could one visit to convert a file?