The erstwhile typewriter is the mother of the modern day personal computer keyboards that we see these days. The basic principal still remains the same like the arrangement of the keys on the keyboard looks exactly like the keys on the kind writer.
With passage of time there have been diverse models and design of personal computer keyboards obtainable within the market. The fundamental types of pc keyboards that we come across in our daily life are Standard, Gaming and multimedia, Thumb sized, and numeric keyboards. Every one of them has a distinct purpose to serve and it totally depends upon the user which 1 he or she really should buy.
You can find some computer keyboards which are called as non standard or special use keyboards. This kind includes the keyboards which are touch screens, chorded keyboards, virtual keyboards, foldable keyboards, and laser or infrared based keyboards. These are the keyboards that we may use in our daily life usage but are not usable as an accompaniment with the normal desk top personal computer that we have at residence.
These are the types that are a lot more suitable for special functions. Like a tablet PC would essentially come with a touch screen keyboard. You would have the alternative of attaching an additional one to it via the USB port in it but that would defeat the purpose of having a tablet PC.
The modern day keyboards are far more than just an input device for your PC nowadays they're processor controlled which is normally a single chip based processor known as the 8048 microcontroller and they also have illuminations on them to supply feedback to the user. A great example of that would be the caps lock and the num lock lights. You could also use the exact same to determine if your system has crashed. They just won't work in case your system has crashed. But the exact same could happen because of a million other troubles too.