The defendants include many different business involved in e-mail marketing.
The other defendants include military commanders and senior intelligence officials.
Defense lawyers say the defendants include at least four army officers and cadets.
Those defendants include institutional investors, insurance companies, corporations, financial institutions and individuals.
The defendants also included eight contractors and six union shop stewards.
The remaining defendants include 17 public utilities, three engineering firms and a financial adviser to the supply system.
Defendants in the case included 20th Century Fox and some Thai government officials.
The 19 defendants include 14 officers on active duty, four retired officers and a civil servant.
The 19 defendants scheduled for trial today included designers and their business associates, as well as Government tax inspectors.
The other defendants include employees and directors of North America and the real estate trust.