Keyboards have become popular for their increased user freedom. A wireless keyboard transmitter and receiver, often involves a combination of link on connected the keyboard port on the computer. Gets the wireless aspect. Available current based on the QWERTY keyboard was at the beginning of the era of the mechanical typewriters, designed their ergonomics are compromised to allow States, the boundaries of the mechanical typewriter. While the paper Llaves levers were connected, the inventor must move freely. the cursor backwards of the liberated town all characters after the first character. Many laptop keyboard key remove (sometimes delete and BACKSPACE are printed with the same key) plays the same role as a backspace. I. before the era of inexpensive computers, would the primary use for multitasking allow that many people use the same computer.Seemingly, multitasking would cause a computer, switching between several programs running slower, directly proportional to the number of programs you are running, but that most programs spend their time waiting on / output devices lenses their tasks. If a program for the user click the mouse or press any keyboard key, then they have a slice be until it produced the event's waiting, waiting. This enables run time for other programs, if many programs can run concurrently, without unacceptable speed loss. ,,.