How computer keyboards work
When you look at all the 1.__________ that are available for new computer keyboards, it can be hard to believe that their original design came from mechanical typewriters that didn’t even use electricity. Now, you can buy 2.__________ keyboards that bear little resemblance to flat,
3.__________ models with ordinary square keys. Some flashier models light up, roll up or fold up, and others offer options for programming your own commands and 4.__________.
But no matter how many bells and whistles they offer, most keyboards 5.__________ using similar technology. They use switches and circuits to translate a person’s 6.__________ into a signal a computer can understand.
A lot of 7.__________ to the traditional keyboard design are an attempt to make them safer or easier to use. For example, some people have associated increased keyboard use with repetitive stress injuries like carpal tunnel syndrome, although scientific studies have produced conflicting results. 2.__________ keyboard designs are intended to keep a person’s hands in a more natural position while typing in an attempt to prevent injuries. While these keyboards can certainly keep people from holding their hands in a “praying mantis” position, studies disagree on whether they actually prevent injury.
The simplest 2.__________ keyboards look like traditional keyboards that have been divided down the middle, keeping a person’s hands farther apart and aligning the wrists with the forearms. More complex designs place the two halves of the keyboard at varying 8.__________ to one another and to the surface on which the keyboard rests. Some go even further, placing the two halves of the keyboard on the armrests of chairs or making them completely 9.__________ the desk surface. Others, like the Datahand, don’t look much like keyboards at all.
Some 7.__________, while not necessarily 2.__________, are designed to make keyboards more portable, more 10.__________ or just cooler.
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