If a 14-2 cable is run from the panel to the outlet, then a 15 amp circuit breaker is the largest that can be used to protect that circuit. If a 12-2 cable is run from the panel to the outlet, then a 20 amp circuit breaker is the largest that can be installed to protect the circuit. Support cable.
Types Of Keyboard. There are two major types of computer keyboards: Basic and Extended. The Basic keyboard contains 104 keys and is enough to perform all the functions that can be done on a Windows PC. The Extended keyboard may have additional keys and the design varies among the companies manufacturing them.
In 1948, the Binac computer (see the lower image) had a Typewriter-Keyboard Unit. The keyboard had eight keys, representing the octal numbers (from 0 to 7), and was used to introduce either the program or data into the computer and memory.