File extension

File type

.ade

Microsoft Access project extension

.adp

Microsoft Access project

.bas

Microsoft Visual Basic class module

.bat

Batch file

.chm

Compiled HTML Help file

.cmd

Microsoft Windows NT Command Script

.com

Microsoft MS-DOS program

.cpl

Control Panel extension

.crt

Security certificate

.exe

Program

.hlp

Help file

.hta

HTML program 

.inf

Setup  Information

.ins

Internet Naming Service

.isp

Internet Communication settings

.js

JScript file

.jse

Jscript Encoded Script file

.lnk

Shortcut

.mda

Microsoft Access add-in program

.mdb

Microsoft Access program

.mde

Microsoft Access MDE database

.mdz

Microsoft Access wizard program

.msc

Microsoft Common Console Document

.msi

Microsoft Windows Installer package

.msp

Windows Installer patch

.mst

Visual Test source files

.pcd

Photo CD image or Microsoft Visual Test compiled script

.pif

Shortcut to MS-DOS program

.reg

Registration entries

.scr

Screen saver

.sct

Windows Script Component

.shs

Shell Scrap Object

.url

Internet shortcut

.vb

VBScript file

.vbe

VBScript Encoded Script file

.vbs

VBScript file

.wsc

Windows Script Component

.wsf

Windows Script file

.wsh

Windows Script Host Settings file