.BAT: "Battery". Temporarily changes the computer setup to align a program to modify the memory needed to run it.
.BMP: "Bitmap". A picture that opens in Paintbrush, or with any image editing software.
.DOC: "Document". It is made with Microsoft Word.
.EXE: "Execute". A program.
.GIF: An image file.
.HLP: "Help". It provides assistance in the program.
.LDB: A secondary data base that supports files for .MDB. Neither file runs without the other.
.MAB: "Master Data Base". A database made with Microsoft Access.
.PPT: "Powerpoint". A Microsoft Powerpoint presentation.
.TMP: "Temporary". Usually a 'trashed' file created when the computer is shut off imporperly.
.TXT: "Text". Usualle a 'read me' file. It opens with any word processor.
.XLS: Microsoft Excel Worksheet
.XLT: Microsoft Excel Template
.WAV: "Wave". A sound file that is open in Soundblaster, or in Sound Recorder.
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