The companies originally planned to file the brief later this coming week, but accelerated efforts over the weekend after other legal challenges to the order, according to people familiar with the matter.
Other companies involved include firms in finance, manufacturing, energy and consumer goods sectors. Its not clear yet which companies will agree to sign on. The goal is to publish the open letter this week.
Garter, Inc. has revised downward its prediction for global IT spending for 2017, to a total of $3.5 trillion. While this represents a 2.7 percent increase from 2016, it is down from earlier projection of 3 percent.