Microsoft made a new pitch to app makers, promising an audience of more than a billion people if they develop services for the upcoming Windows 10 operating system.
Google said it would beef up encryption of its mobile operating system, so that it would not hold "keys" to devices even if it is served with a warrant.
Microsoft sent out invitations to a September 30 event at which it is expected to provide a glimpse at the next version of its Windows operating system.
Chinese state broadcaster CCTV has accused US technology giant Apple of threatening national security through its iPhone's ability to track and time-stamp a user's location.
Apple on Monday unveiled new operating software it hopes will create a seamless experience for users flitting between its coveted mobile devices and popular Macintosh computers.
An appeals court on Friday breathed new life into Oracle's big-money lawsuit against Google by ruling that software commands can be copyrighted just like classic books.
Firefox OS, an upstart smartphone operating system aimed a challenging the Apple and Google duopoly, will power a new category of $25 smartphones for developing countries.
Microsoft unveiled an update to its latest Windows operating system Thursday that included a return of a "Start" button that had been missed by longtime users of the computer software.
Mozilla Foundation announced Sunday it will launch in mid 2013 its widely anticipated Firefox operating system for smartphones in a direct challenge to the duopoly of Apple's iOS and Google's Android.
It seems that Russia's defence ministry has little faith in Google's operating systems: it has just unveiled its own encrypted version that has the remarkably familiar feel of an Android.