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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000021847-02-000279.txt : 20021023
<SEC-HEADER>0000021847-02-000279.hdr.sgml : 20021023
<ACCEPTANCE-DATETIME>20021023130935
ACCESSION NUMBER:		0000021847-02-000279
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20021023
EFFECTIVENESS DATE:		20021023

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LIBERTY ACORN TRUST
		CENTRAL INDEX KEY:			0000002110
		IRS NUMBER:				362692100
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-34223
		FILM NUMBER:		02795933

	BUSINESS ADDRESS:	
		STREET 1:		227 W MONROE STE 3000
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3126349200

	MAIL ADDRESS:	
		STREET 1:		227 W MONROE STE 3000
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ACORN FUND INC
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ACORN INVESTMENT TRUST
		DATE OF NAME CHANGE:	19940204
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>colmidsupp.txt
<DESCRIPTION>COLUMBIA THERM MID SUPP
<TEXT>
                            Columbia Thermostat Fund
                                 Class Z Shares

                         Supplement to Prospectus dated
                               September 25, 2002


The following text replaces the description of the Liberty Select Value Fund,
Class Z, on page 6 of the Fund's prospectus:


    Select Fund seeks long-term growth.

    The Fund invests, under normal market conditions, primarily in middle
    capitalization stocks. These are stock of mid-size companies that have
    market capitalizations similar in size to those companies in the Russell
    MidcapTM Value Index. As of September 30, 2002, that index included
    companies with capitalizations between approximately $224 million and $11
    billion.

    Additional strategies that are not principal investment strategies and the
    risks associated with them are described below under "Other Investment
    Strategies and Risks."


143-36/602L-1002

                           October 21, 2002


</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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