The companies include tech giants such as Apple, Google, and Facebook. They filed the brief on Sunday with a federal appeals court in California.

These firms are protesting the executive order that temporarily prevents entry of people from 7 mostly Muslim nations into the United States.

The brief says the travel ban "inflicts significant harm on American business, innovation, and growth."

It adds that the order "disrupts ongoing business operations" and "threatens companies' ability to attract talent, business, and investment to the United States."

Immigrants from Asia and other parts of the world have long supported the IT industry in places like Silicon Valley in California and the Seattle area in Washington.

Until now, CEOs of individual firms have spoken out against the executive order, including Apple's Tim Cook and Google's Sundar Pichai. The legal brief shows the concerns spread across the whole industry.