MULTI-YEAR, EXPANDED STRATEGIC MARKETING ALLIANCE BETWEEN WORLDCOM AND AMERICA ONLINE OFFERS UNIQUE BENEFITS TO WORLDCOM'S RESIDENTIAL CUSTOMERS

ARLINGTON, Va. and DULLES, Va.-May 24, 2000 -- WorldCom
(NASDAQ: WCOM) and America Online, Inc. (NYSE: AOL) today announced a
unique multi-year consumer Internet alliance under which WorldCom will
market AOL to WorldCom's millions of residential local and long
distance telecom customers, with a bonus of up to an hour of free calls
every month when they join AOL. Also, under the agreement, WorldCom
will offer its residential ISP customers a special opportunity to
convert to the AOL service.
By delivering great savings, and joint products and services, this
consumer telecom and Internet offer provides valuable content to
current and new WorldCom residential local and long distance telecom
customers when they join AOL. It is also another step in the growing
strategic relationship between WorldCom and AOL.

In addition, under this new agreement, existing MCI WorldCom
Internet customers will be offered a special opportunity to convert to
AOL, easily becoming members of the AOL service, and will also be
eligible for additional benefits.

Effective immediately, telecom residential local and long distance
customers subscribed to any of the MCI 5¢ Everyday family of plans and
who join AOL as new members receive:

• Up to one hour of free MCI 5¢ calling each month, as long as they
  remain an MCI WorldCom long distance customer and become a new AOL
  member;
• 500 hours of AOL free in the first month, with unlimited access
  for $21.95 a month after that; and
• $200 in member savings at the online AOL Store.

Benefits for Users of Other MCI WorldCom Calling Plans

All other MCI WorldCom residential customers, as well as small
business customers, can receive a total yearly credit of up to $36.00,
or up to $3 per month, on their WorldCom bill as long as they remain an
MCI WorldCom local or long distance customer and become a new AOL
member, plus 500 hours of AOL free in the first month, with unlimited
access after that, and $200 in member savings at the AOL Store.

"By joining forces with AOL, WorldCom is providing consumers
with more value for their telecom dollar by offering them the leading
consumer ISP product and up to an hour of free calls each month, along
with other unique benefits," said Terry Macko, WorldCom senior
vice president of marketing. "Building on the existing
relationship with AOL and WorldCom, this alliance widens the door for
future WorldCom consumer initiatives with AOL."

"This expansion of our successful relationship with WorldCom
allows us to work together to make joining AOL easy, convenient, and a
great value for MCI WorldCom subscribers," said Jan Brandt,
AOL's President of Marketing. "We look forward to offering
existing MCI WorldCom members all the great benefits that AOL has to
offer, including seven screennames per member, Parental Controls, AOL
Instant Messenger (AIM), convenient AOL keywords, and easy-to-use AOL
Search, in addition to the best commerce and content partners in
cyberspace. We're also pleased to be working with WorldCom to offer
their employees and their families easy, convenient access to the AOL
service."

In addition, AOL and WorldCom are developing a program to encourage
WorldCom employees to experience the benefits of AOL. Under this
program, WorldCom will offer its employees special pricing on a number
of PC options, as well as offering the AOL service as the preferred
provider.

Last month, WorldCom and America Online extended and expanded their
existing agreement for dial-up access services in the U.S. UUNET has
been a provider for AOLnet, the world's largest dial-up network,
for several years. Under the expanded relationship, UUNET will continue
to build out and manage a significant portion of AOLnet, as well as
continue to provide AOL with dial-up services on UUNET's Dial
Access Network.

About WorldCom

WorldCom (NASDAQ: WCOM - news) is a global leader in
"all-distance'' communications services with operations in
more than 65 countries. Revenues in 1999 were $37 billion, with more
than $15 billion from high-growth data, Internet and international
services. WorldCom and Sprint have announced a merger agreement, which
the companies expect to close in the second half of 2000 after
regulatory approvals. For more information go to
http://www.wcom.com.

About America Online, Inc.

Founded in 1985, America Online, Inc., based in Dulles, Virginia, is
the world's leader in interactive services, Web brands, Internet
technologies and e-commerce services. America Online, Inc. operates:
two worldwide Internet services, America Online, with more than 22
million members, and CompuServe, with more than 2.7 million members;
several leading Internet brands including ICQ, AOL Instant Messenger
and Digital City, Inc.; the Netscape Netcenter and AOL.COM portals; the
Netscape Navigator and Communicator browsers; AOL MovieFone, the
nation's #1 movie listing guide and ticketing service; and
Spinner.com and NullSoft's Winamp, leaders in Internet music.
Through its strategic alliance with Sun Microsystems, the company
develops and offers easy-to-deploy, end-to-end e-commerce and
enterprise solutions for companies operating in the Net Economy.