The 30-year-old health sector billionaire
Monitoring what's going on in your body has gripped California's Silicon Valley like a mania.
Enthusiasts wear two or three wrist bands to keep an eye on their blood pressure 24 hours a day.
They use sensors to tell them how many paces they have taken - the recommended daily rate is currently 10,000, I think. That's about five miles.
And up and down the valley, new companies are rushing to get a piece of the action. They are matching body measuring devices to the smartphone, to produce a torrent of data that may or may not be useful to doctors and specialists, if they have the time to deal with it. There are dozens of such entrepreneurial start-ups, maybe hundreds.
It is happening because only very recently have people become permanently connected to the internet in this always-on, display-rich way. Mobile technology is seemingly reordering our relationship with ourselves, as well as the outside world.
How mobile phones became fashion items
I'm a bit slow-minded sometimes, but I'm beginning to wake up to what's happening to technology, right in front of our eyes.
It used to be something driven by engineers in laboratories, working on innovations that might take years to be turned into practical applications - the way that Teflon was a household by-product of the race to the moon.
The importance of being a 'normal'
A useful new word jumped into my inbox the other week and it deserves a wider airing.
The word in question is "normals" and it describes the bulk of technology users - those of us who definitely don't queue up outside gadget shops for the midnight launch of the next new thing.
Should we fear the robots of the future?
The world's oldest technology magazine is the MIT Technology Review.
Published by the Massachusetts Institute of Technology, in 2011 it produced a special supplement of original science fiction stories written by top writers from the genre.
How to conduct your staff
Quite often management books look to the symphony orchestra for examples of leadership in action: the conductor on the podium, conjuring wonderful music from a group of performers who would be rudderless without the man or woman with the stick.
I've always been suspicious of this sort of metaphor, which is compelling mainly because it is so grandiose... it makes bosses feel good about themselves, and puffs them up with the idea that leadership is an art you can master with the right input.
Carphone Warehouse and the art of innovation
Innovation is an exhilarating thing to do, and to report on.
And it is rewarding to bear in mind that even technological innovation is not just about inventing things.
How Poundland's founder got his inspiration
The other day I found myself amidst the stalls of Bilston Market, not far from Wolverhampton in the West Midlands.
I am attracted to markets all over the world.
How GDP became the figure everyone wanted to watch
In my confused head I always get the celebrated economist Diane Coyle muddled up with the celebrated domestic economist Nigella Lawson.
There's a good reason for my muddle. Years ago, I appeared alongside Ms Coyle on a late-night BBC Radio 2 programme hosted by Nigella Lawson's first husband, the late John Diamond.
South Yorkshire's cutting edge technology
The Battle of Orgreave was one of the defining events of the bitter and divisive UK miners' strike of 30 years ago.
In June 1984 there were violent clashes between police and pickets at the Orgreave coking plant, near Rotherham in South Yorkshire.
Let's think about ideas
For a few years I used to open my monthly copy of the metrosexual (well-groomed and fashion-conscious heterosexual man) magazine Monocle with a mixture of quiet expectation and distinct embarrassment.
There on a big black page would usually be a big white quote from me praising somebody else's magazine.