Scientists have used a device that fits in the palm of the hand to sequence the human genome.
They say this great achievement opens up exciting possibilities for using genetics in routine medicine.
Prof Nicholas Loman, one of the researchers from the University of Birmingham, UK said in an interview that genome sequencing will come literally in your pocket just like a mobile phone.
Sequencing technology has the potential to change the way we do medicine.
The research group says the approach was around 99.5% accurate, but also allowed them to look at parts of human DNA that had been poorly studied.