All information stored in a computer is kept in files. Different types of files store different types of information. Each file is given a file name and has a file name extension that identifies the file type. The file name and file name extension are separated by a period or a ‘dot’.
File Extensions:-
Paint = .bmp (bitmap images)
Notepad = .txt (text file)
Wordpad = .rtf (rich text file)
MS-Word = .doc or .docx (document)
Ms-Excel = .xls or .xlsx (spreadsheet)
Ms-Pawerpoint = .ppt or .pptx (presentation)
Ms-Database= .mdb or .db (database)
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