It usually consists of only the left-hand half of a normal keyboard, but is coded in such a way that if a particular key is held down (usually the spacebar), it "jumps" to being the right half of the keyboard, allowing a person to type with only one hand.
It is said to be quick to learn, because our bodies can easily replicate one motion on one side to the other side, and almost as fast as a normal keyboard.
- Morley, Deborah; Parker, Charles (2013). Understanding Computers: Today and Tomorrow (14th ed.). Boston: Cengage Learning. p. 665. ISBN 9781133190240. Retrieved 24 November 2014.
- Lawrence, Elaine; Pernici, Barbara; Krogstie, John (30 August 2004). Mobile Information Systems. New York: Springer Science+Business Media. p. 332. ISBN 9780387228518. Retrieved 24 November 2014.
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