Tablet computers use an OSK (On-Screen Keyboard), usually supplied by the operating system or a piece of software that is supplied with the computer.
netbooks, notebooks and desktop replacements have their own keyboard, and need an identical keyboard if you are looking for a replacement.
mobile phones have their own keyboards, much harder to replace.
No idea
the input devuces of a laptop are the keyboard or touchpad
A KVM switch is a hardware that allows a mouse or keyboard to be used on multiple computers. Most often the mouse, keyboard, and monitor is hooked up to the hardware and a hot key is used to swap between the 'active' computers.
Yes, in most situations it is. However, it depends on the computer. Older computers often had integrated keyboards, as do laptops and tablets. Most modern desktop PCs do have an external keyboard.
An overlay keyboard is a specialized keyboard with no pre-set keys. Each key can be programmed with a wide range of different functions. Overlay keyboards are often used as a quick and easy way to input items with just two buttons.
It is often referred to as "keyboarding."
A KVM switch, or keyboard, video, and mouse switch, is used to connect multiple computers to the same keyboard, video display, and mouse. This setup is often used in situations where one needs to use multiple computers or operating systems at the same time. For example, Network administrators use this method to monitor and control multiple servers simultaneously.
notebook
A KVM (Keyboard, Video, Mouse) switch is a junction that allows you to use the same keyboard, video, and mouse on two or more computers. You plug the devices into the switch, and run the cables from it into each computer. Then you can switch between what computer you want to use with either a small switch, or certain key combinations. Its best used in large organizations where there are hundreds of computers to work with. It gives the network administrators the ability to efficiently and securely manage their information.
There is no such thing as a "handheld card". Do you mean a handheld card-reader? These electronic devices allow you to take credit card payments. They're often used at restaurants and I even went to a yard sale once where the owner could take cards.
A Concept keyboard is used in fast food restaurants, it often contains pictures or images.
Volume control on computers varies with the make and model of the computer, sometimes also the sound card. Most laptop computers have volume controls build into the keyboard using a special function key, often labelled Fn and often labelled in blue, combined with one of two other buttons with a (blue) symbol for volume up and down, respectively.