Vanguard Information Technology Index Fund

Summary Prospectus

December 20, 2011

Admiral™ Shares

Vanguard Information Technology Index Fund Admiral Shares (VITAX)

The Fund’s statutory Prospectus and Statement of Additional Information dated

December 20, 2011, are incorporated into and made part of this Summary

Prospectus by reference.

Before you invest, you may want to review the Fund’s Prospectus, which

contains more information about the Fund and its risks. You can find

the Fund’s Prospectus and other information about the Fund online at

www.vanguard.com/prospectus. You can also get this information at no

cost by calling 800-662-7447 or by sending an e-mail request to

online@vanguard.com.

 

The Securities and Exchange Commission (SEC) has not approved or disapproved of these securities

or passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal

offense.

Investment Objective
The Fund seeks to track the performance of a benchmark index that measures the
investment return of information technology stocks.

Fees and Expenses
The following table describes the fees and expenses you may pay if you buy and hold
Admiral Shares of the Fund.

Shareholder Fees
(Fees paid directly from your investment)
Sales Charge (Load) Imposed on Purchases	None
Purchase Fee	None
Sales Charge (Load) Imposed on Reinvested Dividends	None
Redemption Fee (on shares held less than one year)	2%
Account Service Fee (for fund account balances below $10,000)	$20/year

Annual Fund Operating Expenses
(Expenses that you pay each year as a percentage of the value of your investment)
Management Expenses	0.16%
12b-1 Distribution Fee	None
Other Expenses	0.03%
Total Annual Fund Operating Expenses	0.19%

Example

The following example is intended to help you compare the cost of investing in the
Fund’s Admiral Shares with the cost of investing in other mutual funds. It illustrates
the hypothetical expenses that you would incur over various periods if you invest
$10,000 in the Fund’s shares. This example assumes that the Shares provide a return
of 5% a year and that operating expenses remain as stated in the preceding table. The
results apply whether or not you redeem your investment at the end of the given
period. Although your actual costs may be higher or lower, based on these
assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$19	$61	$107	$243

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells
securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate
higher transaction costs and may result in more taxes when Fund shares are held in a
taxable account. These costs, which are not reflected in annual fund operating
expenses or in the previous expense example, reduce the Fund’s performance. During
the most recent fiscal year, the Fund’s portfolio turnover rate was 6%.

Primary Investment Strategies
The Fund employs a “passive management”—or indexing—investment approach
designed to track the performance of the MSCI US Investable Market Index (IMI)/
Information Technology 25/50, an index made up of stocks of large, medium-size, and
small U.S. companies within the information technology sector, as classified under the
Global Industry Classification Standard (GICS). The GICS information technology
sector is made up of companies in the following three general areas: technology
software and services, including companies that primarily develop software in various
fields (such as the Internet, applications, systems, databases, management, and/or
home entertainment) and companies that provide information technology consulting
and services, data processing, and outsourced services; technology hardware and
equipment, including manufacturers and distributors of communications equipment,
computers and peripherals, electronic equipment, and related instruments; and
semiconductors and semiconductor equipment manufacturers.

The Fund attempts to replicate the target index by investing all, or substantially all, of
its assets in the stocks that make up the Index, holding each stock in approximately
the same proportion as its weighting in the Index.

Primary Risks
An investment in the Fund could lose money over short or even long periods. You
should expect the Fund’s share price and total return to fluctuate within a wide range,
like the fluctuations of the overall stock market. The Fund’s performance could be
hurt by:

• Stock market risk, which is the chance that stock prices overall will decline. Stock
markets tend to move in cycles, with periods of rising prices and periods of falling prices.

• Sector risk, which is the chance that significant problems will affect a particular
sector, or that returns from that sector will trail returns from the overall stock market.
Daily fluctuations in specific market sectors are often more extreme than fluctuations
in the overall market. Because the Fund invests all, or substantially all, of its assets in
the information technology sector, the Fund’s performance largely depends—for
better or for worse—on the general condition of that sector. Companies in the
information technology sector could be affected by, among other things, overall

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economic conditions, short product cycles, rapid obsolescence of products,
competition, and government regulation.

• Nondiversification risk, which is the chance that the Fund’s performance may be
hurt disproportionately by the poor performance of relatively few stocks or even a
single stock. The Fund is considered nondiversified, which means that it may invest a
greater percentage of its assets in the securities of a small number of issuers as
compared with other mutual funds. Because the Fund tends to invest a relatively high
percentage of its assets in its ten largest holdings and in its single largest holding,
nondiversification risk is high for the Fund.

• Investment style risk, which is the chance that returns from small- and mid-
capitalization stocks (to the extent that the Fund’s assets are invested in small- and
mid-cap stocks) will trail returns from the overall stock market. Historically, small- and
mid-cap stocks have been more volatile in price than the large-cap stocks that
dominate the overall market, and they often perform quite differently.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed
by the Federal Deposit Insurance Corporation or any other government agency.

Annual Total Returns
The following bar chart and table are intended to help you understand the risks of
investing in the Fund. The bar chart shows how the performance of the Fund‘s
Admiral Shares has varied from one calendar year to another over the periods shown.
The table shows how the average annual total returns of the Admiral Shares compare
with those of the Fund‘s target Index and other comparative indexes, which have
investment characteristics similar to those of the Fund. Keep in mind that the Fund’s
past performance (before and after taxes) does not indicate how the Fund will perform
in the future. Updated performance information is available on our website at
vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.

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Annual Total Returns — Vanguard Information Technology Index Fund Admiral Shares¹

1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2011, was –7.75%.

During the periods shown in the bar chart, the highest return for a calendar quarter
was 20.60% (quarter ended June 30, 2009), and the lowest return for a quarter was
–25.87% (quarter ended December 31, 2008).

Average Annual Total Returns for Periods Ended December 31, 2010
			Since
			Inception
			(Mar. 25,
	1 Year	5 Years	2004)
Vanguard Information Technology Index Fund Admiral Shares
Return Before Taxes	12.72%	5.46%	5.09%
Return After Taxes on Distributions	12.62	5.38	5.00
Return After Taxes on Distributions and Sale of Fund Shares	8.40	4.69	4.39
Comparative Indexes
(reflect no deduction for fees, expenses, or taxes)
MSCI US IMI/Information Technology	12.79%	5.65%	5.26%
MSCI US IMI/Information Technology 25/50	—	—	—
Spliced US IMI/Information Technology 25/50	12.99	5.69	5.31

Actual after-tax returns depend on your tax situation and may differ from those shown in
the preceding table. When after-tax returns are calculated, it is assumed that the
shareholder was in the highest individual federal marginal income tax bracket at the time
of each distribution of income or capital gains or upon redemption. State and local
income taxes are not reflected in the calculations. Please note that after-tax returns are
not relevant for a shareholder who holds fund shares in a tax-deferred account, such as
an individual retirement account or a 401(k) plan. Also, figures captioned Return After

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Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the
same period if a capital loss occurs upon redemption and results in an assumed tax
deduction for the shareholder.

Investment Advisor
The Vanguard Group, Inc.

Portfolio Manager

Jeffrey D. Miller, Portfolio Manager. He has managed the Information Technology
Index Fund since 2010.

Purchase and Sale of Fund Shares
You may purchase or redeem shares online through our website (vanguard.com), by
mail (The Vanguard Group, P.O. Box 1110, Valley Forge, PA 19482-1110), or by telephone
(800-662-2739). The following table provides the Fund’s minimum initial and subsequent
investment requirements.

Account Minimums	Admiral Shares
To open and maintain an account	$100,000
To add to an existing account	Generally $100 (other than by Automatic Investment Plan, which
	has no established minimum)

Tax Information
The Fund’s distributions may be taxable as ordinary income or capital gain.

Payments to Financial Intermediaries
The Fund and its investment advisor do not pay financial intermediaries for sales of
Fund shares.

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Vanguard Information Technology Index Fund Admiral Shares—Fund Number 5487

THIS FUND IS NOT SPONSORED, ENDORSED, SOLD OR PROMOTED BY MSCI INC. (“MSCI”), ANY OF ITS AFFILIATES, ANY
OF ITS DIRECT OR INDIRECT INFORMATION PROVIDERS OR ANY OTHER THIRD PARTY INVOLVED IN, OR RELATED TO, COM-
PILING, COMPUTING OR CREATING ANY MSCI INDEX (COLLECTIVELY, THE “MSCI PARTIES”). THE MSCI INDEXES ARE THE
EXCLUSIVE PROPERTY OF MSCI. MSCI AND THE MSCI INDEX NAMES ARE SERVICE MARK(S) OF MSCI OR ITS AFFILIATES
AND HAVE BEEN LICENSED FOR USE FOR CERTAIN PURPOSES BY VANGUARD. NONE OF THE MSCI PARTIES MAKES ANY
REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, TO THE OWNERS OF THIS FUND OR ANY MEMBER OF THE PUB-
LIC REGARDING THE ADVISABILITY OF INVESTING IN FUNDS GENERALLY OR IN THIS FUND PARTICULARLY OR THE ABILITY
OF ANY MSCI INDEX TO TRACK CORRESPONDING STOCK MARKET PERFORMANCE. MSCI OR ITS AFFILIATES ARE THE
LICENSORS OF CERTAIN TRADEMARKS, SERVICE MARKS AND TRADE NAMES AND OF THE MSCI INDEXES WHICH ARE
DETERMINED, COMPOSED AND CALCULATED BY MSCI WITHOUT REGARD TO THIS FUND OR THE ISSUER OR OWNER OF
THIS FUND. NONE OF THE MSCI PARTIES HAS ANY OBLIGATION TO TAKE THE NEEDS OF THE ISSUERS OR OWNERS OF
THIS FUND INTO CONSIDERATION IN DETERMINING, COMPOSING OR CALCULATING THE MSCI INDEXES. NONE OF THE
MSCI PARTIES IS RESPONSIBLE FOR OR HAS PARTICIPATED IN THE DETERMINATION OF THE TIMING OF, PRICES AT, OR
QUANTITIES OF THIS FUND TO BE ISSUED OR IN THE DETERMINATION OR CALCULATION OF THE CONSIDERATION INTO
WHICH THIS FUND IS REDEEMABLE. NONE OF THE MSCI PARTIES HAS ANY OBLIGATION OR LIABILITY TO THE OWNERS
OF THIS FUND IN CONNECTION WITH THE ADMINISTRATION, MARKETING OR OFFERING OF THIS FUND.

ALTHOUGH MSCI SHALL OBTAIN INFORMATION FOR INCLUSION IN OR FOR USE IN THE CALCULATION OF THE MSCI INDEXES
FROM SOURCES WHICH MSCI CONSIDERS RELIABLE, NONE OF THE MSCI PARTIES WARRANTS OR GUARANTEES THE
ORIGINALITY, ACCURACY AND/OR THE COMPLETENESS OF ANY MSCI INDEX OR ANY DATA INCLUDED THEREIN. NONE OF THE
MSCI PARTIES MAKES ANY WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY LICENSEE, LICENSEE’S
CUSTOMERS OR COUNTERPARTIES, ISSUERS OF THE FUNDS, OWNERS OF THE FUNDS, OR ANY OTHER PERSON OR ENTITY,
FROM THE USE OF ANY MSCI INDEX OR ANY DATA INCLUDED THEREIN IN CONNECTION WITH THE RIGHTS LICENSED
HEREUNDER OR FOR ANY OTHER USE. NONE OF THE MSCI PARTIES SHALL HAVE ANY LIABILITY FOR ANY ERRORS, OMISSIONS
OR INTERRUPTIONS OF OR IN CONNECTION WITH ANY MSCI INDEX OR ANY DATA INCLUDED THEREIN. FURTHER, NONE OF THE
MSCI PARTIES MAKES ANY EXPRESS OR IMPLIED WARRANTIES OF ANY KIND, AND THE MSCI PARTIES HEREBY EXPRESSLY
DISCLAIM ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO ANY MSCI
INDEX AND ANY DATA INCLUDED THEREIN. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT SHALL ANY OF THE
MSCI PARTIES HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL OR ANY OTHER DAMAGES
(INCLUDING WITHOUT LIMITATION LOST PROFITS) EVEN IF NOTIFIED OF THE POSSIBILITY OF SUCH DAMAGES.

© 2011 The Vanguard Group, Inc. All rights reserved.

Vanguard Marketing Corporation, Distributor.

SP 5487 122011