For starters, e-readers are
handheld electronic devices which has the capability to simulate a conventional text book.
Not exact matches
The study sample size was small and it used only one intensity of light, 1,000 lux,
which is far greater than the intensity of a typical
handheld electronic device, she notes.
There has been a surge in popularity of
electronic readers such as the Kindle,
which promise cheaper books delivered straight to the
handheld device via the internet.