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File Extensions A file extension is the END-PART of the file name It is a period, followed by 3-4 letters The file extension tells your computer what program created the file, and what program to open the file in. Program File extension Word .doc .docx Excel (spreadsheet) .xls .xlsx Adobe .pdf PowerPoint .ppt Web Page .html (hypertext markup language) Publisher .pub A program start-up file “Executable file” .exe Pictures (Photoshop) .jpg .gif .bmp .tiff .wmf Music (Itunes, Mediaplayer) .mp3, .mp4, .wma .wav Webpage endings? – Not quite the same thing! URL = Universal Resource Locator The URL is the address of the webpage The endings of the URL is called the DOMAIN NAME URL Domain End part Meaning? www.google.co m google.com .com Commerce

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File Extensions

A file extension is the END-PART of the file name It is a period, followed by 3-4 letters The file extension tells your computer what program created the file, and what program

to open the file in.

Program File extensionWord .doc .docxExcel (spreadsheet) .xls .xlsxAdobe .pdfPowerPoint .pptWeb Page .html

(hypertext markup language)Publisher .pubA program start-up file“Executable file”

.exe

Pictures(Photoshop)

.jpg .gif .bmp .tiff .wmf

Music(Itunes, Mediaplayer)

.mp3, .mp4, .wma .wav

Webpage endings? – Not quite the same thing!

URL = Universal Resource Locator The URL is the address of the webpage The endings of the URL is called the DOMAIN NAME

URL Domain End part Meaning?www.google.com google.com .com Commercewww.ncsu.edu ncsu.edu .edu Educationwww.usa.gov usa.gov .gov Governmentwww.usafa.af.mil usafa.af.mil .mil Military

.us United stateswww.redcross.org redcross.org .org Non-profit organization

.biz business