what is meant by input and output devices
Input/output I/O devices are the pieces of hardware used by a human (or other system) to communicate with a computer. For instance, a keyboard or computer mouse is an input device for a computer, while monitors and printers are output devices. Devices for communication between computers, such as modems and network cards, typically perform both input and output operations.
Factors of production In economics, factors of production, resources, or inputs are what is used in the production process to produce outputâ€”that is, finished goods and services. The utilized amounts of the various inputs determine the quantity of output according to the relationship is called the production function. There are three basic resources or factors of production: land, labour and capital. The factors are also frequently labelled "producer goods or services" to distinguish them from the goods or services purchased by consumers, which are frequently labeled "consumer goods". All three of these are required in combination at a time to produce a commodity.