Nassau County, NY Selects Integrated Assessment Software from Tyler Technologies.

New Contract Valued at $5.5 Million

DALLAS -- Tyler Technologies, Inc. (NYSE:TYL) announced today that it has reached an agreement with Nassau County, New York, to provide its Integrated Assessment System (IAS) software to administer property valuations and manage taxes.

Through the $5.5 million deal, Nassau County will extend its current use of Tyler's IAS real property assessment software to include appeals, tax billing, collection and refunds. The County, which has been a long-time Tyler client for both software and property reappraisal services, decided to select Tyler for this most recent software purchase following a thorough procurement process.

"We are pleased to be expanding our professional relationship with Tyler Technologies," said Robert Checca, Nassau County's Commissioner of Information Technology. "Nassau County already has a good working partnership with Tyler. And now they have emerged, after a competitive bid, as the best company to meet our growing IT needs in the area of real property assessment."

One major element of the project is the customization of the Assessment Appeals application to fulfill the County's ARC (Assessment Review Commission) requirements. Tyler will take a phased approach to implementation, with the initial focus being placed on meeting the workflow management needs of the ARC. Workflow will be configured to meet the high-volume, high-value tasks affecting assessments.

Andrew Teed, president of Tyler's CLT division, believes Nassau's extensive evaluation process resulted in Tyler Technologies being the clear choice. "Nassau County executed a comprehensive search when choosing a software solution that would best serve its current needs. Tyler has the expertise to meet those needs head on. We're pleased to have been selected, and we are proud of our long-standing relationship with Nassau County," he stated.

Home to more than 1.3 million residents, Nassau County is the 27th largest county in the United States. Located on Long Island, it is part of the greater New York metropolitan area and is known for its sandy beaches, beautiful parks and plentiful shopping. With more than 418,000 parcels of property and a total market value of approximately $235 billion in 2006, Nassau County is the second largest assessing unit in New York State.

Based in Dallas, Tyler Technologies is a leading provider of end-to-end information management solutions and services for local governments. Tyler partners with clients to make local government more accessible to the public, more responsive to needs of citizens, and more efficient. Tyler's client base includes more than 6,000 local government offices throughout all 50 states, Canada, Puerto Rico and the United Kingdom. In April 2007, Tyler was named one of "America's 100 Most Trustworthy Companies" by Audit Integrity, an independent research firm. More information about Tyler Technologies can be found at www.tylertech.com.

Tyler Technologies, Inc. has included in this press release "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 concerning its business and operations. Tyler Technologies expressly disclaims any obligation to release publicly any updates or revisions to these forward-looking statements to reflect any change in its expectations. These expectations and the related statements are inherently subject to risks and uncertainties that could cause actual results to differ materially from those set forth in, contemplated by, or underlying the forward-looking statements. The risks and uncertainties which forward-looking statements are subject to include, but are not limited to, changes in competition, changes in general economic conditions, changes in the budgets and regulatory environments of the Company's customers, risks associated with the development of new products and the enhancement of existing products, the ability to attract and retain qualified personnel, and other risks detailed from time to time in the Company's filings with the Securities and Exchange Commission.