News Bitcoin is an experimental digital currency that has gained popularity worldwide

James Howells accidentally threw away a hard drive containing the cryptographic "private key" needed to access the digital currency

Sony's issues guide to PS4's "Blue Light of Death" error

Sony says these "isolated incidents [...] represent a very small percentage of total units shipped to consumers to date"

Why filling hard drives with helium can boost storage capacity by 50%

The latest innovation in hard drive technology has taken years to perfect but means quieter, more energy efficient hard drives that fit more data in the same space

'Digital downtime' means we spend more than five days each year waiting for computers to load

Slow PCs and laptops have entered the top seven list of our everyday annoyances

Elsener with the hugely popular knife: he served the family firm for 70 years before handing over to his son, Carl IV

Carl Elsener: Businessman who transformed the Swiss Army Knife into a global product

Starting as a teenage apprentice cutler, Carl Elsener went on to turn a relatively simple penknife into the global phenomenon that is the multi-functional Swiss Army Knife. He worked for the Swiss family firm Victorinox for 70 years, 57 of them as CEO, and retained the honorary, almost spiritual title "Senior Leader" until his death at the age of 90.

The Sound of One Hand Killing, By Teresa Solana

Teresa Solana is already known to us, as are her terrible twins, through two previous crime novels. Again translated by Peter Bush, The Sound of One Hand Killing is, however, the first in the series in which Solana and her twin Barcelona private eyes, Borja ("Pep") and Eduard Masdeu, actually meet on the page.

The device doesn’t do much that you couldn’t do by hooking your television up to an Android phone

A Week With: Android Mini 4.0

A smart-TV device you'd have to be an android to love

Elite: the old and the new

30 years on, game fans put up cash for sequel to Elite

Computer game flies again after Kickstarter crowdsourcing hit

Jessica's recipe bag: 'There were vegetables, there was cheese, there was meat, there was fish – there was even a lime for my gin and tonic. The cost? £69.'

On The Menu: Jessica's Recipe Bag; Joseph Joseph; Da Mhile whisky; Paxton and Whitfield; Coya restaurant

This week I've been eating... Jessica's Recipe Bag

The 10 Best tough gadgets

If you regularly wreck mobiles, need a watch that can take a kicking or fancy a water-proof MP3, check these out...

Coroner criticises MI6 investigation into spy Gareth Williams' death

MI6 and a senior detective were accused today of failing to disclose vital evidence in the death riddle of spy Gareth Williams.

Win a motion-activated outdoor security camera worth £119

When you're asleep or away from your house, do you worry about looking after your property? What are you doing to protect against vandalism, break-ins, or car and garden theft?

The latest of the Asterix films,starring Gérard Depardieu, left, could be destroyed in the dispute

Asterix and the big fight to save 36 French films

An unwelcome silence threatens the next film of the French actor, Jean Dujardin, whose silent movie, The Artist, is wowing audiences around the globe.

Intel warns of diluted profits as Thai floods hit its supplies

The computing giant Intel Corp has become the latest technology firm to warn its profits will take a hit because of the continued fallout from Thailand's autumn floods.

Market Report: Pace switched on by good news from US supplier

Punters were plugging back into Pace yesterday as the beleaguered set-top box maker – which has issued three profit warnings in a year – was finally on the receiving end of some good news.

The Misogynist, By Piers Paul Read

Over 30 years on from his 1979 bestseller A Married Man, Piers Paul Read revisits the mid-life crisis. Geoffrey Jomier is a retired barrister living in Hammersmith.

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Day In a Page

Independent Travel
Burgundy, the River Rhone & Provence – Five-star MS Swiss Corona 7 nights from £999pp
Lake Como St Moritz & the Bernina Express 7 nights from £809pp
Vietnam
Lake Maggiore, Orta & the Matterhorn 7 nights from £939pp
South Africa
Spain
Prices correct as of 19 December 2014
Aren’t you glad you didn’t say that? The worst wince-and-look-away quotes of the year

Aren’t you glad you didn’t say that?

The worst wince-and-look-away quotes of the year
Hollande's vanity project is on a high-speed track to the middle of nowhere

Vanity project on a high-speed track to nowhere

France’s TGV network has become mired in controversy
Sports Quiz of the Year

Sports Quiz of the Year

So, how closely were you paying attention during 2014?
Alexander Armstrong on insulting Mary Berry, his love of 'Bargain Hunt', and life as a llama farmer

Alexander Armstrong on insulting Mary Berry and his love of 'Bargain Hunt'

From Armstrong and Miller to Pointless
Sanchez helps Gunners hold on after Giroud's moment of madness

Sanchez helps Gunners hold on

Olivier Giroud's moment of madness nearly costs them
A Christmas without hope: Fears grow in Gaza that the conflict with Israel will soon reignite

Christmas without hope

Gaza fears grow that conflict with Israel will soon reignite
After 150 years, you can finally visit the grisliest museum in the country

The 'Black Museum'

After 150 years, you can finally visit Britain's grisliest museum
No ho-ho-hos with Nick Frost's badass Santa

No ho-ho-hos with Nick Frost's badass Santa

Doctor Who Christmas Special TV review
Chilly Christmas: Swimmers take festive dip for charity

Chilly Christmas

Swimmers dive into freezing British waters for charity
Veterans' hostel 'overwhelmed by kindness' for festive dinner

Homeless Veterans appeal

In 2010, Sgt Gary Jamieson stepped on an IED in Afghanistan and lost his legs and an arm. He reveals what, and who, helped him to make a remarkable recovery
Isis in Iraq: Yazidi girls killing themselves to escape rape and imprisonment by militants

'Jilan killed herself in the bathroom. She cut her wrists and hanged herself'

Yazidi girls killing themselves to escape rape and imprisonment
Ed Balls interview: 'If I think about the deficit when I'm playing the piano, it all goes wrong'

Ed Balls interview

'If I think about the deficit when I'm playing the piano, it all goes wrong'
He's behind you, dude!

US stars in UK panto

From David Hasselhoff to Jerry Hall
Grace Dent's Christmas Quiz: What are you – a festive curmudgeon or top of the tree?

Grace Dent's Christmas Quiz

What are you – a festive curmudgeon or top of the tree?
Nasa planning to build cloud cities in airships above Venus

Nasa planning to build cloud cities in airships above Venus

Planet’s surface is inhospitable to humans but 30 miles above it is almost perfect