TeleCommunication Systems Inc.

TeleCommunication Systems Inc. is listed on NASDAQ (TSYS). TeleCommunication Systems, Inc. applies highly reliable wireless data communications technology to solutions for customers. We are a Maryland corporation founded in 1987 with our headquarters located at 275 West Street, Annapolis, Maryland 21401. Our Web address is www.telecomsys.com. The information contained on our Web site does not constitute part of this Annual report on Form 10-K. All of our filings with the Securities and Exchange Commission will be available through a link on our website. The terms TCS, we, us and our as used in this Annual Report on Form 10-K refer to TeleCommunication Systems, Inc. and its subsidiaries as a combined entity, except where it is made clear that such terms mean only TeleCommunication Systems, Inc. On January 13, 2004, we purchased the Enterprise business unit of Aether Systems, Inc. with an effective date of January 1, 2004. On September 20, 2004, we acquired substantially all the assets of Kivera, Inc.

Telecomunicacoes de Sao Paulo S.A.

Telecomunicacoes de Sao Paulo S.A. is listed on NYSE (TSP). General Following the restructuring and privatization of Telebrás, discussed below, we were incorporated on November 30, 1999, as a corporation (sociedade anônima) organized under the laws of the Federative Republic of Brazil. We are registered with the CVM, as a publicly held company and our stock is traded on BOVESPA. We are also registered with the SEC in the United States and our ADSs are traded on the New York Stock Exchange, or NYSE. Our headquarters are located at Rua Martiniano de Carvalho, 851 -21º andar, 01321-001, São Paulo, SP, Brasil. Our telephone number is 55-11-3549-7922. As of December 31, 2005, we had 164,061,698 outstanding common shares, with no par value per share, and 327,968,193 preferred shares, with no par value per share, after the reverse stock split that was approved on May 11, 2005.

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