Originally an acronym for Grid Cache File (Grid was an early codename for Steam), GCF is now commonly taken to mean Game Cache File. GCF's are the name of the single files in which Steam games are stored and official content is downloaded.
* The file extension of a Word document is .doc * The file extension of an Excel speadsheet is .xls
Yes
.doc or .docx
.xls or .xlsx
It depends on the type of document, if it's a Microsoft word document it will have a file extension of .doc if it's a adobe acrobat document it'll have an extension of .pdf, at any rate you can Google the extension and it will tell you what kind of program created it, hope it helps. Karp.
i have seen one, swf
.doc
.DOCX
.doc
the Microsoft word files are called document
.docx . They changed the extension from Word 2007. Meanwhile, you can choose to save the document in the old format (Word 1997-2003)
It helps you extend your document