How can I print "*" in unix shell program

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From: ��
Date: Fri, 10 May 2002 12:52

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I wanna print *
But following script prints files in current directory
How can I print *

[root@ns /root]# cat a.sh
#!/bin/sh

AA="*"
echo $AA
[root@ns /root]# ./a.sh
Desktop a.sh dnsCache.db hostsInfo.db intop_history manage nsmail ntop_pw.db
sec

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arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!newsfeed.dacom.co.kr!news.kigam.re.kr!feeder.kornet.net!news1.kornet.net!not-for-mail

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From: "�����" <myunggyu@hotmail.com>
Newsgroups: comp.unix.programmer,comp.unix.shell,han.comp.os.linux.devel
Subject: How can I print "*" in unix shell program
Date: Fri, 10 May 2002 21:52:35 +0900
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