Be Aware! for this - List of Executable File Extensions & their Definition

A file with an executable file extension means that the file format supports some ability to run
additional automatic tasks. This means that if you open a file with one of these file extensions, your Windows
PC could, without your continued permission, run any number of additional operations programmed into that file.

Those operations could be welcome if you were to run a program setup for a software application you just
downloaded. Those operations could be damaging if you were to run a virus
infected executable file attached to an email from an unknown source.

You should always avoid opening executable files from suspicious emails or websites. Even if you are very comfortable
about the source of an executable file, you should always exercise caution and common sense before opening.

Below is an incomplete list of executable file extensions.

A6P: Authorware 6 Program
AC: Autoconfig Script
AS: Adobe Flash ActionScript File
ACR: ACRobat Script
ACTION: Automator Action
AIR: Adobe AIR Installation Package
APP: FoxPro Generated Application
APP: Symbian OS Application
AWK: AWK Script
BAT: Batch File
CGI: Common Gateway Interface Script
CMD: Windows Command
COM: DOS Command File
CSH: C Shell Script
DEK: Eavesdropper Batch File
DLD: EdLog Compiled Program
DS: TWAIN Data Source
EBM: EXTRA! Basic Macro
ESH: Extended Shell Batch File
EXE: Windows Executable File
EZS: EZ-R Stats Batch Script
FKY: FoxPro Macro
FRS: Flash Renamer Script
FXP: FoxPro Compiled Source
GADGET: Windows Gadget
HMS: HostMonitor Script File
HTA: HTML Application
ICD: SafeDisc Encrypted Program
INX: Compiled Script
IPF: SMS Installer Script
ISU: InstallShield Uninstaller Script
JAR: Java Archive File
JS: JScript Executable Script
JSE: JScript Encoded File
JSX: ExtendScript Script File
KIX: KiXtart Script File
MCR: 3ds Max Macroscript File
MEM: Macro Editor Macro
MPX: FoxPro Compiled Menu Program
MS: 3ds Max Script File
MST: Windows SDK Setup Transform Script
OBS: ObjectScript Script File
PAF: Portable Application Installer File
PEX: ProBoard Executable File
PIF: Program Information File
PRC: Palm Resource Code File
PRG: Generica Program File
PVD: Instalit Script
PWC: PictureTaker File
PY: Python Script
PYC: Python Compiled File
PYO: Python Optimized Code
QPX: FoxPro Compiled Query Program
RBX: Rembo-C Compiled Script
RGS: Registry Script
ROX: Actuate Report Object Executable File
RPJ: Real Pac Batch Job File
SCAR: SCAR Script
SCR: Script File
SCRIPT: Generic Script File
SCT: Windows Script Component
SHB: Windows Shortcut into a Document
SHS: Shell Scrap Object File
SPR: FoxPro Generated Screen File
TLB: OLE Type Library
TMS: Telemate Script
U3P: U3 Smart Application
UDF: Excel User Defined Function
VB: VBScript File
VBE: VBScript Encoded Script File
VBS: VBScript File
VBSCRIPT: Visual Basic Script
WCM: WordPerfect Macro
WPK: WordPerfect Macro
WS: Windows Script
WSF: Windows Script File
XQT: SuperCalc Macro File

Following is a partial list of file types that should be considered suspicious when received in email
and should not be opened unless you requested or expected the attachment:

ADE - Microsoft Access Project Extension
ADP - Microsoft Access Project
BAS - Visual Basic Class Module
BAT - Batch File
CHM - Compiled HTML Help File
CMD - Windows NT Command Script
COM - MS-DOS Application
CPL - Control Panel Extension
CRT - Security Certificate
DLL - Dynamic Link Library
DO* - Word Documents and Templates
EXE - Application
HLP - Windows Help File
HTA - HTML Applications
INF - Setup Information File
INS - Internet Communication Settings
ISP - Internet Communication Settings
JS - JScript File
JSE - JScript Encoded Script File
LNK - Shortcut
MDB - Microsoft Access Application
MDE - Microsoft Access MDE Database
MSC - Microsoft Common Console Document
MSI - Windows Installer Package
MSP - Windows Installer Patch
MST - Visual Test Source File
OCX - ActiveX Objects
PCD - Photo CD Image
PIF - Shortcut to MS-DOS Program
POT - PowerPoint Templates
PPT - PowerPoint Files
REG - Registration Entries
SCR - Screen Saver
SCT - Windows Script Component
SHB - Document Shortcut File
SHS - Shell Scrap Object
SYS - System Config/Driver
URL - Internet Shortcut (Uniform Resource Locator)
VB - VBScript File
VBE - VBScript Encoded Script File
VBS - VBScript Script File
WSC - Windows Script Component
WSF - Windows Script File
WSH - Windows Scripting Host Settings File
XL* - Excel Files and Templates

tnx sa info tol .. hitted !