When thinking about regulating them, it's useful to know Facebook, Amazon, Google, Apple and Microsoft have some similarities. But generally they're not competing with each other – or anyone else.
Apple's closed system may be its undoing in the smart home market.
Apple's iPhone X is here, which means its push into augmented reality begins in earnest.
It hasn't been a good round of earnings for Silicon Valley's big names.
If Facebook already knows how you feel from reading what you post, soon it will know from reading the expressions on your face.
What's the best way for spy agencies to protect the public: secretly exploit software flaws to gather intelligence, or warn the world and avert malicious cyberattacks?
"It is time for a digital Geneva Convention to protect the internet."
Facebook wants to stop violent videos appearing in its feeds, but we must ensure human moderators don't suffer.
When technology evolves, it affects not only your financial position but also your ability to exercise other choices.
Microsoft Kinect's cheap sensors could create low-cost 3D computer models of crime scenes.
We don't expect our own government to hack our email – but it's happening, in secret, and if current court cases go badly, we may never know how often.
Unlike their counterparts in Europe, U.S. antitrust regulators and courts have tended to view 'free' products as outside their purview for enforcement.
With LinkedIn showing little evidence of growth, Microsoft's reasons for its US$26 billion spend on the company are explored.
Microsoft's strategy for LinkedIn is likely to follow the path of Yammer.
Tech giant Microsoft wants to rid the world of "dumb" passwords to improve online security. But maybe it's the password itself we should dump.
Tech companies play a growing civic role in how we operate as a society. We need to be sure we're happy with that.
The world's largest technology companies are making public the programming and hardware designs at the center of their businesses.
There are many recent cases of women being abused or harassed online. But technology can also play a role in preventing violence against women.
Microsoft warned back in 2014 that anyone continuing to use Windows XP, once it ended support, would be vulnerable to attack. So why are some organisations still using the old operating system?
The tax law established pre-internet is failing to keep up with the digital economy.