Actuate to Offer its e.Business Solution Through USinternetworking's AppHost Program.

ANNAPOLIS, Md. and SAN MATEO, Calif.--(BUSINESS WIRE)--Sept. 27, 1999--

USinternetworking, Inc. (Nasdaq:USIX), the leading Application Service Provider (ASP), and Actuate Corporation (Nasdaq:ACTU), the pioneer in e.Reporting(TM) for e.Business, today announced Actuate will offer its e.Business solution through USi's AppHost program. USi's AppHost program enables business software suites to be accessed over USi's unique global data centers and network. Actuate-the fastest, easiest and best way for companies to add business data to their e.Business Web sites-will leverage USi's ASP-grade infrastructure to offer Actuate's leading e.Business solution to clients without requiring them to build out their existing infrastructure.

"By offering its leading e.Business solution using USi's AppHost services, Actuate enables its end customers to access its Web content creation and management solution for business data on an outsourced basis, so that these customers can focus resources where they are needed most," said Daniel Neal, Vice President of Applications Hosting at USi. "We are pleased to help Actuate offer its application as a service."

USi's AppHost service was introduced to enable Independent Software Vendors to effectively provide their customers with their software products as Internet-based services. USi is the only company in the ASP market that built enterprise data centers and a global network specifically designed for delivering and managing Web-enabled business applications.

"As companies continue to look to the Web to run their mission-critical applications, we owe it to our customers to ensure they can access our products any way they choose," said Nico Nierenberg, Actuate's Chairman and Chief Executive Officer. "By leveraging USi's robust network, our customers - big, medium and small - have yet another means to employ these business tools and get their e.Business sites online as soon as possible."

USi's AppHost program will offer Actuate the ability to:

-- Leverage USi's experiences and innovative business model to increase market penetration;

-- Deliver software as a service rather than a product;

-- Add more successful customers and references;

-- Leverage USi's ASP grade infrastructure and brand to build market share.

Under the AppHost program, Actuate will additionally incorporate USi's Application Consulting and Engineering (ACE) expertise to implement Actuate AppHost solutions using USi's RAPID iMAP methodology.

Actuate e.Reporting Suite 4 automates the generation of high-value, structured business information and delivers it as a seamlessly integrated component of an e.Business web site.

With Actuate, customers can create any type of e.Report, of any length, from any data source, in any format, using any calculation, enabling dynamic, personalized e.Reports to each one of thousands of users without compromising corporate data or network performance. The solution also gives users a simple, intuitive way to browse and search their e.Reports for a clear view of even the most complex information.

About Actuate Corporation

Actuate Corporation, the pioneer in e.Reporting for e.Business, enables companies to differentiate their offerings by extending the value of information across the entire customer lifecycle, creating a more loyal customer base and giving them the edge in the ever-competitive e.Business world. The Actuate e.Reporting Suite 4 is the first-ever solution that automates the creation and delivery of structured, personalized content, providing tens of thousands of users with instant access to high-resolution, customized business information that is seamlessly integrated into a company's e.Business Web site.

Actuate's customers include the world's largest .com, financial services, telecommunications, health care and media companies. Software vendors reselling Actuate solutions include Ariba, Ascend, Aspect Development, Clarify, PeopleSoft, Siebel, and Vantive. Founded in 1993, and headquartered in San Mateo, Calif., Actuate has offices worldwide.

Actuate, Live Report Documents, Report Encyclopedia and ReportCast are registered trademarks of Actuate Corporation. e.Report, e.Reporting, Live Report Extensions, ReportBlast, SmartSearch, Transporter, Virtual Report Distribution and XML Reports are trademarks of Actuate Corporation. All other products and corporate names referenced are trademarks of their respective companies. (c) 1999, Actuate Corporation.

About USinternetworking Inc.

Headquartered in Annapolis, MD, USinternetworking Inc. (Nasdaq: USIX) is the leading Application Service Provider (ASP) outsourcing business applications over the Internet for a flat monthly fee. USi's iMAP(SM) services allow companies to quickly deploy enterprise applications without the associated cost and burden of owning, managing or supporting the applications or underlying infrastructure. USi has built its own global network of enterprise data centers-a Cisco-Powered Network-to interconnect with major Internet backbone providers through contractual PriorityPeering(SM) relationships that ensure fast and reliable connections. USi's data centers incorporate EMC (NYSE:EMC) Enterprise Storage systems and software to provide nationwide data mirroring and recovery. USi's suite of Internet Managed Application Provider(SM) (iMAP) offerings ensures the fastest implementation possible, allowing customers to focus on their core business. IMAP services include: Financial Management and Human Resources, powered by PeopleSoft and Lawson; Enterprise Relationship Management, powered by Siebel Systems; Electronic Commerce, powered by BroadVision and Microsoft; Business Intelligence, powered by Sagent Technology; Professional Services Automation powered by Niku; and USi Web Site Management. USi also offers its AppHost program, which enables Independent Software Vendors to deliver their applications on an outsourced basis by leveraging USi's unique strengths.

Internet Managed Application Provider, iMAP, AppHost and PriorityPeering are service marks of USinternetworking, Inc. All other trademarks are the property of their respective owners. USi strategic partners and providers are publicly traded on Nasdaq under the symbols: BVSN, CSCO, MSFT, PSFT, SEBL, and SGNT.